Scripting Reference

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This page lists scripting commands.

Yes these are the same commands as in the menus, same as in "Commands and Shortcuts" too, just presented differently.

  • Presented in a format useful to people using:
  • Most of this page is automatically generated.
A few commands are intentionally omitted from the Macro Manager (such as "Close:") because they are unsuitable for use in Macros.
Advice This table shows the items in the menus that are scriptable.
  • The Scripting Ids, parameters and defaults are all likely to change between versions.
  • Boolean values must be given as 1 (true) or 0 (false).

File Menu

The File Menu provides commands for creating, opening and saving Audacity projects and importing and exporting audio files
Scripting Id Action Parameters Description
New: New none Creates a new empty project window, to start working on new or imported tracks.
Open: Open none Presents a standard dialog box where you can select either audio files, a list of files (.LOF) or an Audacity Project file to open.
Close: Close none Closes the current project window, prompting you to save your work if you have not saved.
SaveProject: Save Project none Various ways to save a project.
ExportAudio: Export Audio none Export audio files in various formats.
PageSetup: Page Setup none Opens the standard Page Setup dialog box prior to printing
Print: Print none Prints all the waveforms in the current project window (and the contents of Label Tracks or other tracks), with the Timeline above. Everything is printed to one page.
Exit: Exit none Closes all project windows and exits Audacity. If there are any unsaved changes to your project, Audacity will ask if you want to save them.

File: Save Project

Various ways to save a project.
Scripting Id Action Parameters Description
Save: Save Project none Saves the current Audacity project .AUP3 file.
SaveAs: Save Project As none Same as "Save Project" above, but allows you to save a copy of an open project to a different name or location
SaveCopy: Save Lossless Copy of Project none Saves the current Audacity project .AUP3 file.
SaveCompressed: Save Compressed Copy of Project none Saves in the audacity .aup3 project file format, but compressed (Suitable for mailing)

File: Export Other

For exporting audio files
Scripting Id Action Parameters Description
ExportLabels: Export Labels none Exports audio at one or more labels to file(s).
ExportMIDI: Export MIDI none Exports MIDI (note tracks) to a MIDI file.

File: Import

For importing audio files or label files into your project
Scripting Id Action Parameters Description
ImportAudio: Audio none Similar to 'Open', except that the file is added as a new track to your existing project.
ImportLabels: Labels none Launches a file selection window where you can choose to import a single text file into the project containing point or region labels. For more information about the syntax for labels files, see Importing and Exporting Labels.
ImportMIDI: MIDI none Imports a MIDI (MIDI or MID extension) or Allegro (GRO) file to a Note Track where simple cut-and-paste edits can be performed. The result can be exported with the File > Export> > Export MIDI command. Note: Currently, MIDI and Allegro files cannot be played.
ImportRaw: Raw Data none Attempts to import an uncompressed audio file that might be "raw" data without any headers to define its format, might have incorrect headers or be otherwise partially corrupted, or might be in a format that Audacity is unable to recognize. Raw data in textual format cannot be imported.

Edit Menu

The Edit Menu provides standard edit commands (Undo, Redo, Cut, Copy, Paste and Delete) plus many other commands specific to editing audio or labels
Scripting Id Action Parameters Description
Undo: Undo none Undoes the most recent editing action.
Redo: Redo none Redoes the most recently undone editing action.
Cut: Cut none Removes the selected audio data and/or labels and places these on the Audacity clipboard. By default, any audio or labels to right of the selection are shifted to the left.
Delete: Delete none Removes the selected audio data and/or labels without copying these to the Audacity clipboard. By default, any audio or labels to right of the selection are shifted to the left.
Copy: Copy none Copies the selected audio data to the Audacity clipboard without removing it from the project.
Paste: Paste none Inserts whatever is on the Audacity clipboard at the position of the selection cursor in the project, replacing whatever audio data is currently selected, if any.
Duplicate: Duplicate none Creates a new track containing only the current selection as a new clip.
EditMetaData: Metadata none The Metadata Editor modifies information about a track, such as the artist and genre. Typically used with MP3 files.
Preferences: Preferences none Preferences let you change most of the default behaviors and settings of Audacity. On Mac, Preferences are in the Audacity Menu and the default shortcut is ⌘ + ,.

Edit: Remove Special

For more "advanced" removal of audio
Scripting Id Action Parameters Description
SplitCut: Split Cut none Same as Cut, but none of the audio data or labels to right of the selection are shifted.
SplitDelete: Split Delete none Same as Delete, but none of the audio data or labels to right of the selection are shifted.
Silence: Silence Audio none Replaces the currently selected audio with absolute silence. Does not affect label tracks.
Trim: Trim Audio none Deletes all audio but the selection. If there are other separate clips in the same track these are not removed or shifted unless trimming the entire length of a clip or clips. Does not affect label tracks.

Edit: Clip Boundaries

Create or remove separate clips in the audio track. A clip inside an audio track is a separate section of that track which has been split so that it can be manipulated somewhat independently of the other clips in the track.
Scripting Id Action Parameters Description
Split: Split none Splits the current clip into two clips at the cursor point, or into three clips at the selection boundaries.
SplitNew: Split New none Does a Split Cut on the current selection in the current track, then creates a new track and pastes the selection into the new track.
Join: Join none If you select an area that overlaps one or more clips, they are all joined into one large clip. Regions in-between clips become silence.
Disjoin: Detach at Silences none In a selection region that includes absolute silences, creates individual non-silent clips between the regions of silence. The silence becomes blank space between the clips.

Edit: Labels

These commands are to add and edit labels.
Scripting Id Action Parameters Description
EditLabels: Label Editor none Brings up a dialog box showing all of your labels in a keyboard-accessible tabular view. Handy buttons in the dialog let you insert or delete a label, or import and export labels to a file. See Label Editor for more details.
AddLabel: Add Label at Selection none Creates a new, empty label at the cursor or at the selection region.
AddLabelPlaying: Add Label at Playback Position none Creates a new, empty label at the current playback or recording position.
PasteNewLabel: Paste Text to New Label none Pastes the text on the Audacity clipboard at the cursor position in the currently selected label track. If there is no selection in the label track a point label is created. If a region is selected in the label track a region label is created. If no label track is selected one is created, and a new label is created.
TypeToCreateLabel: Type to Create a Label (on/off) none When a label track has the colored focus border, if this option is on, just type to create a label. Otherwise you must create a label first.

Edit: Labeled Audio

Labeled Audio commands apply standard Edit Menu commands to the audio of one or more regions that are labeled. The labels themselves are not affected.
Scripting Id Action Parameters Description
CutLabels: Cut none Same as the Cut command, but operates on labeled audio regions.
DeleteLabels: Delete none Same as the Delete command, but operates on labeled audio regions.
SplitCutLabels: Split Cut none Same as the Split Cut command, but operates on labeled audio regions.
SplitDeleteLabels: Split Delete none Same as the Split Delete command, but operates on labeled audio regions.
SilenceLabels: Silence Audio none Same as the Silence Audio command, but operates on labeled audio regions.
CopyLabels: Copy none Same as the Copy command, but operates on labeled audio regions.
SplitLabels: Split none Same as the Split command, but operates on labeled audio regions or points.
JoinLabels: Join none Same as the Join command, but operates on labeled audio regions or points. You may need to select the audio and use Edit > Clip Boundaries > Join, to join all regions or points.
DisjoinLabels: Detach at Silences none Same as the Detach at Silences command, but operates on labeled audio regions.

Select Menu

Select Menu has commands that enable you make selections of tracks or parts of the tracks in your project.
Scripting Id Action Parameters Description
SelectAll: All none Selects all of the audio in all of the tracks.
SelectNone: None none Deselects all of the audio in all of the tracks.
SelCursorStoredCursor: Cursor to Stored Cursor Position none Selects from the position of the cursor to the previously stored cursor position
StoreCursorPosition: Store Cursor Position none Stores the current cursor position for use in a later selection
ZeroCross: At Zero Crossings none Moves the edges of a selection region (or the cursor position) slightly so they are at a rising zero crossing point.

Select: Tracks

Tracks
Scripting Id Action Parameters Description
SelAllTracks: In All Tracks none Extends the current selection up and/or down into all tracks in the project.
SelSyncLockTracks: In All Sync-Locked Tracks none Extends the current selection up and/or down into all sync-locked tracks in the currently selected track group.

Select: Region

For modifying, saving and restoring a selection.
Scripting Id Action Parameters Description
SetLeftSelection: Left at Playback Position none When Audacity is playing, recording or paused, sets the left boundary of a potential selection by moving the cursor to the current position of the green playback cursor (or red recording cursor).

Otherwise, opens the "Set Left Selection Boundary" dialog for adjusting the time position of the left-hand selection boundary. If there is no selection, moving the time digits backwards creates a selection ending at the former cursor position, and moving the time digits forwards provides a way to move the cursor forwards to an exact point.

SetRightSelection: Right at Playback Position none When Audacity is playing, recording or paused, sets the right boundary of the selection, thus drawing the selection from the cursor position to the current position of the green playback cursor (or red recording cursor).

Otherwise, opens the "Set Right Selection Boundary" dialog for adjusting the time position of the right-hand selection boundary. If there is no selection, moving the time digits forwards creates a selection starting at the former cursor position, and moving the time digits backwards provides a way to move the cursor backwards to an exact point.

SelTrackStartToCursor: Track Start to Cursor none Selects a region in the selected track(s) from the start of the track to the cursor position.
SelCursorToTrackEnd: Cursor to Track End none Selects a region in the selected track(s) from the cursor position to the end of the track.
SelTrackStartToEnd: Track Start to End none Selects a region in the selected track(s) from the start of the track to the end of the track.
SelSave: Store Selection none Stores the end points of a selection for later reuse.
SelRestore: Retrieve Selection none Retrieves the end points of a previously stored selection.

Select: Spectral

For making a selection of a frequency range.
Scripting Id Action Parameters Description
ToggleSpectralSelection: Toggle Spectral Selection none Changes between selecting a time range and selecting the last selected spectral selection in that time range. This command toggles the spectral selection even if not in Spectrogram view, but you must be in Spectrogram view to use the spectral selection in one of the Spectral edit effects.
NextHigherPeakFrequency: Next Higher Peak Frequency none When in Spectrogram view, snaps the center frequency to the next higher frequency peak, moving the spectral selection upwards.
NextLowerPeakFrequency: Next Lower Peak Frequency none When in Spectrogram views snaps the center frequency to the next lower frequency peak, moving the spectral selection downwards.

Select: Clip Boundaries

For modifying a selection, taking account of clips.
Scripting Id Action Parameters Description
SelPrevClipBoundaryToCursor: Previous Clip Boundary to Cursor none Selects from the current cursor position back to the right-hand edge of the previous clip.
SelCursorToNextClipBoundary: Cursor to Next Clip Boundary none Selects from the current cursor position forward to the left-hand edge of the next clip.
SelPrevClip: Previous Clip none Moves the selection to the previous clip.
SelNextClip: Next Clip none Moves the selection to the next clip.

View Menu

View Menu has commands that determine the amount of detail you see in all the tracks in the project window. It also lets you show or hide Toolbars and some additional windows such as Undo History.
Scripting Id Action Parameters Description
UndoHistory: History none Brings up the History window which can then be left open while using Audacity normally. History lists all undoable actions performed in the current project, including importing.
Karaoke: Karaoke none Brings up the Karaoke window, which displays the labels in a "bouncing ball" scrolling display
MixerBoard: Mixer none Mixer is an alternative view to the audio tracks in the main tracks window. Analogous to a hardware mixer board, each audio track is displayed in a Track Strip.
ShowExtraMenus: Extra Menus (on/off) none Shows extra menus with many extra less-used commands.
ShowClipping: Show Clipping in Waveform none Option to show or not show audio that is too loud (in red) on the wave form.

View: Zoom

Zoom in/out on the horizontal axis. Show more detail or show a longer length of time.
Scripting Id Action Parameters Description
ZoomIn: Zoom In none Zooms in on the horizontal axis of the audio displaying more detail over a shorter length of time.
ZoomNormal: Zoom Normal none Zooms to the default view which displays about one inch per second.
ZoomOut: Zoom Out none Zooms out displaying less detail over a greater length of time.
ZoomSel: Zoom to Selection none Zooms in or out so that the selected audio fills the width of the window.
ZoomToggle: Zoom Toggle none Changes the zoom back and forth between two preset levels.
AdvancedVZoom: Advanced Vertical Zooming none Enable for left-click gestures in the vertical scale to control zooming.

View: Track Size

Controls the sizes of tracks.
Scripting Id Action Parameters Description
FitInWindow: Fit to Width none Zooms out until the entire project just fits in the window.
FitV: Fit to Height none Adjusts the height of all the tracks until they fit in the project window.
CollapseAllTracks: Collapse All Tracks none Collapses all tracks to take up the minimum amount of space.
ExpandAllTracks: Expand Collapsed Tracks none Expands all collapsed tracks to their original size before the last collapse.

View: Skip to

Move forward/backwards through the audio
Scripting Id Action Parameters Description
SkipSelStart: Selection Start none When there is a selection, moves the cursor to the start of the selection and removes the selection.
SkipSelEnd: Selection End none When there is a selection, moves the cursor to the end of the selection and removes the selection.

View: Toolbars

Toolbars can be used to determine which of the Audacity toolbars are displayed. By default all toolbars are shown except Spectral Selection, Cut/Copy/Paste and Spectral Selection
Scripting Id Action Parameters Description
ResetToolbars: Reset Toolbars none Using this command positions all toolbars in default location and size as they were when Audacity was first installed
ShowTransportTB: Transport Toolbar none Controls playback and recording and skips to start or end of project when neither playing or recording
ShowToolsTB: Tools Toolbar none Chooses various tools for selection, volume adjustment, zooming and time-shifting of audio
ShowRecordMeterTB: Recording Meter Toolbar none Displays recording levels and toggles input monitoring when not recording
ShowPlayMeterTB: Playback Meter Toolbar none Displays playback levels
ShowMixerTB: Mixer Toolbar none Adjusts the recording and playback volumes of the devices currently selected in Audio Setup Toolbar
ShowEditTB: Edit Toolbar none Cut, copy, paste, trim audio, silence audio, undo, redo, zoom tools
ShowTranscriptionTB: Play-at-Speed Toolbar none Plays audio at a slower or faster speed than normal, affecting pitch
ShowScrubbingTB: Scrub Toolbar none Controls playback and recording and skips to start or end of project when neither playing or recording
ShowDeviceTB: Device Toolbar none Selects audio host, recording device, number of recording channels and playback device
ShowSelectionTB: Selection Toolbar none Adjusts cursor and region position by keyboard input
ShowSpectralSelectionTB: Spectral Selection Toolbar none Displays and lets you adjust the current spectral (frequency) selection without having to be in Spectrogram view

Transport Menu

Transport Menu commands let you play or stop, loop play, scrub play or record (including timed and sound activated recordings).
Scripting Id Action Parameters Description
RescanDevices: Rescan Audio Devices none Rescan for audio devices connected to your computer, and update the playback and recording dropdown menus in Audio Setup Toolbar

Transport: Playing

These commands control playback in Audacity. You can Start, Stop or Pause playback of the audio in your project.
Scripting Id Action Parameters Description
PlayStop: Play/Stop none Starts and stops playback or stops a recording (stopping does not change the restart position). Therefore using any play or record command after stopping with "Play/Stop" will start playback or recording from the same Timeline position it last started from. You can also assign separate shortcuts for Play and Stop.
PlayStopSelect: Play/Stop and Set Cursor none Starts playback like "Play/Stop", but stopping playback sets the restart position to the stop point. When stopped, this command is the same as "Play/Stop". When playing, this command stops playback and moves the cursor (or the start of the selection) to the position where playback stopped.
Pause: Pause none Temporarily pauses playing or recording without losing your place.

Transport: Recording

These commands control recording in Audacity. You can Start, Stop or Pause recording in your project. You can either start a recording on your existing track or on a new track.
Scripting Id Action Parameters Description
Record1stChoice: Record none Starts recording at the end of the currently selected track(s).
Record2ndChoice: Record New Track none Recording begins on a new track at either the current cursor location or at the beginning of the current selection.
TimerRecord: Timer Record none Brings up the Timer Record dialog.
PunchAndRoll: Punch and Roll Record none Re-record over audio, with a pre-roll of audio that comes before.
Pause: Pause none Temporarily pauses playing or recording without losing your place.

Transport: Scrubbing

Scrubbing is the action of moving the mouse pointer right or left so as to adjust the position, speed or direction of playback, listening to the audio at the same time - a convenient way to quickly navigate the waveform to find a particular event of interest. Speed changes are made by rotating the mouse wheel while scrubbing.
Scripting Id Action Parameters Description
Scrub: Scrub none Scrubbing is the action of moving the mouse pointer right or left so as to adjust the position, speed or direction of playback, listening to the audio at the same time.
Seek: Seek none Seeking is similar to Scrubbing except that it is playback with skips, similar to using the seek button on a CD player.
ToggleScrubRuler: Scrub Ruler none Shows (or hides) the scrub ruler, which is just below the timeline.

Transport: Cursor to

These commands let you move the cursor to the start or end of the selection, track or any adjacent Clip that you may have
Scripting Id Action Parameters Description
CursSelStart: Selection Start none Moves the left edge of the current selection to the center of the screen, without changing the zoom level.
CursSelEnd: Selection End none Moves the right edge of the current selection to the center of the screen, without changing the zoom level.
CursTrackStart: Track Start none Moves the cursor to the start of the selected track.
CursTrackEnd: Track End none Moves the cursor to the end of the selected track.
CursPrevClipBoundary: Previous Clip Boundary none Moves the cursor position back to the right-hand edge of the previous clip
CursNextClipBoundary: Next Clip Boundary none Moves the cursor position forward to the left-hand edge of the next clip
CursProjectStart: Project Start none Moves the cursor to the beginning of the project.
CursProjectEnd: Project End none Moves the cursor to the end of the project.


Transport: Transport Options

This submenu lets you manage and set various options for transport (playing and recording) in Audacity
Scripting Id Action Parameters Description
SoundActivationLevel: Sound Activation Level none Sets the activation level above which Sound Activated Recording will record.
SoundActivation: Sound Activated Recording (on/off) none Toggles on and off the Sound Activated Recording option.
PinnedHead: Enable pinned play head none You can change Audacity to play and record with a fixed head pinned to the Timeline. You can adjust the position of the fixed head by dragging it
Overdub: Hear other tracks during recording none Toggles on and off the Hear other tracks during recording (overdub) option.
SWPlaythrough: Enable audible input monitoring none Toggles on and off the Enable audible input monitoring option.

Tracks Menu

Tracks Menu provides commands for creating and removing tracks, applying operations to selected tracks such as mixing, resampling or converting from stereo to mono, and lets you add or edit labels.
Scripting Id Action Parameters Description
Resample: Resample none Allows you to resample the selected track(s) to a new sample rate for use in the project
RemoveTracks: Remove Tracks none Removes the selected track(s) from the project. Even if only part of a track is selected, the entire track is removed.
SyncLock: Sync-Lock Tracks (on/off) none Ensures that length changes occurring anywhere in a defined group of tracks also take place in all audio or label tracks in that group.

Tracks: Add New

Adds a new track
Scripting Id Action Parameters Description
NewMonoTrack: Mono Track none Creates a new empty mono audio track.
NewStereoTrack: Stereo Track none Adds an empty stereo track to the project
NewLabelTrack: Label Track none Adds an empty label track to the project
NewTimeTrack: Time Track none Adds an empty time track to the project. Time tracks are used to speed up and slow down audio.

Tracks: Mix

Mixes down selected tracks to mono or stereo tracks
Scripting Id Action Parameters Description
Stereo to Mono: Mix Stereo Down to Mono none Converts the selected stereo track(s) into the same number of mono tracks, combining left and right channels equally by averaging the volume of both channels.
MixAndRender: Mix and Render none Mixes down all selected tracks to a single mono or stereo track, rendering to the waveform all real-time transformations that had been applied (such as track gain, panning, amplitude envelopes or a change in Project Sample Rate).
MixAndRenderToNewTrack: Mix and Render to New Track none Same as Tracks > Mix and Render except that the original tracks are preserved rather than being replaced by the resulting "Mix" track.

Tracks: Mute/Unmute

Mutes or unmutes audio tracks in the project
Scripting Id Action Parameters Description
MuteAllTracks: Mute All Tracks none Mutes all the audio tracks in the project as if you had used the mute buttons from the Track Control Panel on each track.
UnmuteAllTracks: Unmute All Tracks none Unmutes all the audio tracks in the project as if you had released the mute buttons from the Track Control Panel on each track.
MuteTracks: Mute Tracks none Mutes the selected tracks.
UnmuteTracks: Unmute Tracks none Unmutes the selected tracks.

Tracks: Pan

Pans left right or center audio tracks in the project
Scripting Id Action Parameters Description
PanLeft: Left none Pan selected audio to left speaker
PanRight: Right none Pan selected audio centrally.
PanCenter: Center none Pan selected audio to right speaker.

Tracks: Align Tracks

Commands that provide an automatic way of aligning selected tracks with the cursor, the selection, or with the start of the project.
Scripting Id Action Parameters Description
Align_EndToEnd: Align End to End none Aligns the selected tracks one after the other, based on their top-to-bottom order in the project window.
Align_Together: Align Together none Align the selected tracks so that they start at the same (averaged) start time.
Align_StartToZero: Start to Zero none Aligns the start of selected tracks with the start of the project.
Align_StartToSelStart: Start to Cursor/Selection Start none Aligns the start of selected tracks with the current cursor position or with the start of the current selection.
Align_StartToSelEnd: Start to Selection End none Aligns the start of selected tracks with the end of the current selection.
Align_EndToSelStart: End to Cursor/Selection Start none Aligns the end of selected tracks with the current cursor position or with the start of the current selection.
Align_EndToSelEnd: End to Selection End none Aligns the end of selected tracks with the end of the current selection.
MoveSelectionWithTracks: Move Selection with Tracks (on/off) none Toggles on/off the selection moving with the realigned tracks, or staying put.

Tracks: Sort Tracks

Sorts all tracks in the project from top to bottom in the project window, by Start Time or by Name.
Scripting Id Action Parameters Description
SortByTime: By Start Time none Sort tracks in order of start time.
SortByName: By Name none Sort tracks in order by name.

Generate Menu

Generate Menu lets you create audio containing tones, noise or silence.
Scripting Id Action Parameters Description
ManageGenerators: Plugin Manager none Selecting this option from the Effect Menu (or the Generate Menu or Analyze Menu) takes you to a dialog where you can enable or disable particular Effects, Generators and Analyzers in Audacity. Even if you do not add any third-party plugins, you can use this to make the Effect menu shorter or longer as required. For details see Plugin Manager.
Built-in: Built-in none Shows the list of available Audacity built-in effects but only if the user has effects "Grouped by Type" in Effects Preferences.
Nyquist: Nyquist none Shows the list of available Nyquist effects but only if the user has effects "Grouped by Type" in Effects Preferences.

Generate: Built-in

Shows the list of available Audacity built-in effects but only if the user has effects "Grouped by Type" in Effects Preferences.
Scripting Id Action Parameters Description
Chirp: Chirp double StartFreq, (default:440)

double EndFreq, (default:1320)
double StartAmp, (default:0.8)
double EndAmp, (default:0.1)
enum Waveform, (default:Sine)

  • Sine
  • Square
  • Sawtooth
  • Square, no alias

enum Interpolation, (default:Linear)

  • Linear
  • Logarithmic
 Generates four different types of tone waveforms like the Tone Generator, but additionally allows setting of the starting and ending amplitude and frequency.
DtmfTones: DTMF Tones string Sequence, (default:audacity)

double Duty Cycle, (default:55)
double Amplitude, (default:0.8)

 Generates dual-tone multi-frequency (DTMF) tones like those produced by the keypad on telephones.
Noise: Noise enum Type, (default:White)
  • White
  • Pink
  • Brownian

double Amplitude, (default:0.8)

 Generates 'white', 'pink' or 'brown' noise.
Tone: Tone double Frequency, (default:440)

double Amplitude, (default:0.8)
enum Waveform, (default:Sine)

  • Sine
  • Square
  • Sawtooth
  • Square, no alias

enum Interpolation, (default:Linear)

  • Linear
  • Logarithmic
 Generates one of four different tone waveforms: Sine, Square, Sawtooth or Square (no alias), and a frequency between 1 Hz and half the current [[Audio Settings Preferences|Project Sample Rate.

Generate: Nyquist

Shows the list of available Nyquist effects but only if the user has effects "Grouped by Type" in Effects Preferences.
Scripting Id Action Parameters Description
Pluck: Pluck int pitch, (default:0)

enum fade, (default:Abrupt)

  • Abrupt
  • Gradual

double dur, (default:0)

 A synthesized pluck tone with abrupt or gradual fade-out, and selectable pitch corresponding to a MIDI note.
RhythmTrack: Rhythm Track double tempo, (default:0)

int timesig, (default:0)
double swing, (default:0)
int bars, (default:0)
double click-track-dur, (default:0)
double offset, (default:0)
enum click-type, (default:Metronome)

  • Metronome
  • Ping (short)
  • Ping (long)
  • Cowbell
  • ResonantNoise
  • NoiseClick
  • Drip (short)
  • Drip (long)

int high, (default:0)
int low, (default:0)

 Generates a track with regularly spaced sounds at a specified tempo and number of beats per measure (bar).
RissetDrum: Risset Drum double freq, (default:0)

double decay, (default:0)
double cf, (default:0)
double bw, (default:0)
double noise, (default:0)
double gain, (default:0)

 Produces a realistic drum sound.

Effect Menu

Audacity includes many built-in effects and also lets you use a wide range of plugin effects.
Scripting Id Action Parameters Description
ManageEffects: Plugin Manager none Selecting this option from the Effect Menu (or the Generate Menu or Analyze Menu) takes you to a dialog where you can enable or disable particular Effects, Generators and Analyzers in Audacity. Even if you do not add any third-party plugins, you can use this to make the Effect menu shorter or longer as required. For details see Plugin Manager.
RepeatLastEffect: Repeat Last Effect none Repeats the last used effect at its last used settings and without displaying any dialog.
LADSPA: LADSPA none Shows the list of available LADSPA effects but only if the user has effects "Grouped by Type" in Effects Preferences.

Effect: Built-in

No special notes for Built-in
Scripting Id Action Parameters Description
Amplify: Amplify float Ratio, (default:0.9)

bool AllowClipping, (default:False)

 Increases or decreases the volume of the audio you have selected.
AutoDuck: Auto Duck double DuckAmountDb, (default:-12)

double InnerFadeDownLen, (default:0)
double InnerFadeUpLen, (default:0)
double OuterFadeDownLen, (default:0.5)
double OuterFadeUpLen, (default:0.5)
double ThresholdDb, (default:-30)
double MaximumPause, (default:1)

 Reduces (ducks) the volume of one or more tracks whenever the volume of a specified "control" track reaches a particular level. Typically used to make a music track softer whenever speech in a commentary track is heard.
BassAndTreble: Bass and Treble double Bass, (default:0)

double Treble, (default:0)
double Gain, (default:0)
bool Link Sliders, (default:False)

 Increases or decreases the lower frequencies and higher frequencies of your audio independently; behaves just like the bass and treble controls on a stereo system.
ChangePitch: Change Pitch double Percentage, (default:0)

bool SBSMS, (default:False)

 Change the pitch of a selection without changing its tempo.
ChangeSpeed: Change Speed and Pitch double Percentage, (default:0)
 Change the speed of a selection, also changing its pitch.
ChangeTempo: Change Tempo double Percentage, (default:0)

bool SBSMS, (default:False)

 Change the tempo and length (duration) of a selection without changing its pitch.
ClickRemoval: Click Removal int Threshold, (default:200)

int Width, (default:20)

 Click Removal is designed to remove clicks on audio tracks and is especially suited to declicking recordings made from vinyl records.
Compressor: Compressor double Threshold, (default:-12)

double NoiseFloor, (default:-40)
double Ratio, (default:2)
double AttackTime, (default:0.2)
double ReleaseTime, (default:1)
bool Normalize, (default:True)
bool UsePeak, (default:False)

 Compresses the dynamic range by two alternative methods. The default "RMS" method makes the louder parts softer, but leaves the quieter audio alone. The alternative "peaks" method makes the entire audio louder, but amplifies the louder parts less than the quieter parts. Make-up gain can be applied to either method, making the result as loud as possible without clipping, but not changing the dynamic range further.
Distortion: Distortion enum Type, (default:Hard Clipping)
  • Hard Clipping
  • Soft Clipping
  • Soft Overdrive
  • Medium Overdrive
  • Hard Overdrive
  • Cubic Curve (odd harmonics)
  • Even Harmonics
  • Expand and Compress
  • Leveller
  • Rectifier Distortion
  • Hard Limiter 1413

bool DC Block, (default:False)
double Threshold dB, (default:-6)
double Noise Floor, (default:-70)
double Parameter 1, (default:50)
double Parameter 2, (default:50)
int Repeats, (default:1)

 Use the Distortion effect to make the audio sound distorted. By distorting the waveform the frequency content is changed, which will often make the sound "crunchy" or "abrasive". Technically this effect is a waveshaper. The result of waveshaping is equivalent to applying non-linear amplification to the audio waveform. Preset shaping functions are provided, each of which produces a different type of distortion.
Echo: Echo float Delay, (default:1)

float Decay, (default:0.5)

 Repeats the selected audio again and again, normally softer each time and normally not blended into the original sound until some time after it starts. The delay time between each repeat is fixed, with no pause in between each repeat. For a more configurable echo effect with a variable delay time and pitch-changed echoes, see Delay.
FadeIn: Fade In none Applies a linear fade-in to the selected audio - the rapidity of the fade-in depends entirely on the length of the selection it is applied to. For a more customizable logarithmic fade, use the Envelope Tool on the Tools Toolbar.
FadeOut: Fade Out none Applies a linear fade-out to the selected audio - the rapidity of the fade-out depends entirely on the length of the selection it is applied to. For a more customizable logarithmic fade, use the Envelope Tool on the Tools Toolbar.
FilterCurve: Filter Curve EQ size_t FilterLength, (default:8191)

bool InterpolateLin, (default:False)
enum InterpolationMethod, (default:B-spline)

  • B-spline
  • Cosine
  • Cubic

double f0, (default:0)
double v0, (default:0)

 Adjusts the volume levels of particular frequencies
GraphicEq: Graphic EQ size_t FilterLength, (default:8191)

bool InterpolateLin, (default:False)
enum InterpolationMethod, (default:B-spline)

  • B-spline
  • Cosine
  • Cubic

double f0, (default:0)
double v0, (default:0)

 Adjusts the volume levels of particular frequencies
Invert: Invert none This effect flips the audio samples upside-down. This normally does not affect the sound of the audio at all. It is occasionally useful for vocal removal.
LoudnessNormalization: Loudness Normalization bool StereoIndependent, (default:False)

double LUFSLevel, (default:-23)
double RMSLevel, (default:-20)
bool DualMono, (default:True)
int NormalizeTo, (default:0)

 Changes the perceived loudness of the audio.
NoiseReduction: Noise Reduction none This effect is ideal for reducing constant background noise such as fans, tape noise, or hums. It will not work very well for removing talking or music in the background. More details here
This effect is not currently available from scripting.
Normalize: Normalize double PeakLevel, (default:-1)

bool ApplyGain, (default:True)
bool RemoveDcOffset, (default:True)
bool StereoIndependent, (default:False)

 Use the Normalize effect to set the maximum amplitude of a track, equalize the amplitudes of the left and right channels of a stereo track and optionally remove any DC offset from the track
Paulstretch: Paulstretch float Stretch Factor, (default:10)

float Time Resolution, (default:0.25)

 Use Paulstretch only for an extreme time-stretch or "stasis" effect, This may be useful for synthesizer pad sounds, identifying performance glitches or just creating interesting aural textures. Use Change Tempo or Sliding Time Scale rather than Paulstretch for tasks like slowing down a song to a "practice" tempo.
Phaser: Phaser int Stages, (default:2)

int DryWet, (default:128)
double Freq, (default:0.4)
double Phase, (default:0)
int Depth, (default:100)
int Feedback, (default:0)
double Gain, (default:-6)

 The name "Phaser" comes from "Phase Shifter", because it works by combining phase-shifted signals with the original signal. The movement of the phase-shifted signals is controlled using a Low Frequency Oscillator (LFO).
Repair: Repair none Fix one particular short click, pop or other glitch no more than 128 samples long.
Repeat: Repeat int Count, (default:1)
 Repeats the selection the specified number of times.
Reverb: Reverb double RoomSize, (default:75)

double Delay, (default:10)
double Reverberance, (default:50)
double HfDamping, (default:50)
double ToneLow, (default:100)
double ToneHigh, (default:100)
double WetGain, (default:-1)
double DryGain, (default:-1)
double StereoWidth, (default:100)
bool WetOnly, (default:False)

 A configurable stereo reverberation effect with built-in and user-added presets. It can be used to add ambience (an impression of the space in which a sound occurs) to a mono sound. Also use it to increase reverberation in stereo audio that sounds too "dry" or "close".
Reverse: Reverse none Reverses the selected audio; after the effect the end of the audio will be heard first and the beginning last.
SlidingStretch: Sliding Stretch double RatePercentChangeStart, (default:0)

double RatePercentChangeEnd, (default:0)
double PitchHalfStepsStart, (default:0)
double PitchHalfStepsEnd, (default:0)
double PitchPercentChangeStart, (default:0)
double PitchPercentChangeEnd, (default:0)

 This effect allows you to make a continuous change to the tempo and/or pitch of a selection by choosing initial and/or final change values.
TruncateSilence: Truncate Silence double Threshold, (default:-20)

enum Action, (default:Truncate Detected Silence)

  • Truncate Detected Silence
  • Compress Excess Silence

double Minimum, (default:0.5)
double Truncate, (default:0.5)
double Compress, (default:50)
bool Independent, (default:False)

 Automatically try to find and eliminate audible silences. Do not use this with faded audio.
Wahwah: Wahwah double Freq, (default:1.5)

double Phase, (default:0)
int Depth, (default:70)
double Resonance, (default:2.5)
int Offset, (default:30)
double Gain, (default:-6)

 Rapid tone quality variations, like that guitar sound so popular in the 1970's.

Effect: Nyquist

No special notes for Nyquist
Scripting Id Action Parameters Description
AdjustableFade: Adjustable Fade enum type, (default:Up)
  • Up
  • Down
  • SCurveUp
  • SCurveDown

double curve, (default:0)
enum units, (default:Percent)

  • Percent
  • dB

double gain0, (default:0)
double gain1, (default:0)
enum preset, (default:None)

  • None
  • LinearIn
  • LinearOut
  • ExponentialIn
  • ExponentialOut
  • LogarithmicIn
  • LogarithmicOut
  • RoundedIn
  • RoundedOut
  • CosineIn
  • CosineOut
  • SCurveIn
  • SCurveOut
 enables you to control the shape of the fade (non-linear fading) to be applied by adjusting various parameters; allows partial (that is not from or to zero) fades up or down.
ClipFix: Clip Fix double threshold, (default:0)

double gain, (default:0)

 Clip Fix attempts to reconstruct clipped regions by interpolating the lost signal.
CrossfadeClips: Crossfade Clips Use Crossfade Clips to apply a simple crossfade to a selected pair of clips in a single audio track.
CrossfadeTracks: Crossfade Tracks enum type, (default:ConstantGain)
  • ConstantGain
  • ConstantPower1
  • ConstantPower2
  • CustomCurve

double curve, (default:0)
enum direction, (default:Automatic)

  • Automatic
  • OutIn
  • InOut
 Use Crossfade Tracks to make a smooth transition between two overlapping tracks one above the other. Place the track to be faded out above the track to be faded in then select the overlapping region in both tracks and apply the effect.
Delay: Delay enum delay-type, (default:Regular)
  • Regular
  • BouncingBall
  • ReverseBouncingBall

double dgain, (default:0)
double delay, (default:0)
enum pitch-type, (default:PitchTempo)

  • PitchTempo
  • LQPitchShift

double shift, (default:0)
int number, (default:0)
enum constrain, (default:Yes)

  • Yes
  • No
 A configurable delay effect with variable delay time and pitch shifting of the delays.
High-passFilter: High-Pass Filter double frequency, (default:0)

enum rolloff, (default:dB6)

  • dB6
  • dB12
  • dB24
  • dB36
  • dB48
 Passes frequencies above its cutoff frequency and attenuates frequencies below its cutoff frequency.
Limiter: Limiter enum type, (default:SoftLimit)
  • SoftLimit
  • HardLimit
  • SoftClip
  • HardClip

double gain-L, (default:0)
double gain-R, (default:0)
double thresh, (default:0)
double hold, (default:0)
enum makeup, (default:No)

  • No
  • Yes
 Limiter passes signals below a specified input level unaffected or gently reduced, while preventing the peaks of stronger signals from exceeding this threshold. Mastering engineers often use this type of dynamic range compression combined with make-up gain to increase the perceived loudness of an audio recording during the audio mastering process.
Low-passFilter: Low-Pass Filter double frequency, (default:0)

enum rolloff, (default:dB6)

  • dB6
  • dB12
  • dB24
  • dB36
  • dB48
 Passes frequencies below its cutoff frequency and attenuates frequencies above its cutoff frequency.
NotchFilter: Notch Filter double frequency, (default:0)

double q, (default:0)

 Greatly attenuate ("notch out"), a narrow frequency band. This is a good way to remove mains hum or a whistle confined to a specific frequency with minimal damage to the remainder of the audio.
SpectralEditMultiTool: Spectral edit multi tool When the selected track is in spectrogram or spectrogram log(f) view, applies a notch filter, high pass filter or low pass filter according to the spectral selection made. This effect can also be used to change the audio quality as an alternative to using Equalization.
SpectralEditParametricEq: Spectral edit parametric EQ double control-gain, (default:0)
 When the selected track is in spectrogram or spectrogram log(f) view and the spectral selection has a center frequency and an upper and lower boundary, performs the specified band cut or band boost. This can be used as an alternative to Equalization or may also be useful to repair damaged audio by reducing frequency spikes or boosting other frequencies to mask spikes.
SpectralEditShelves: Spectral edit shelves double control-gain, (default:0)
 When the selected track is in spectrogram or spectrogram log(f) view, applies either a low- or high-frequency shelving filter or both filters, according to the spectral selection made. This can be used as an alternative to Equalization or may also be useful to repair damaged audio by reducing frequency spikes or boosting other frequencies to mask spikes.
StudioFadeOut: Studio Fade Out Applies a more musical fade out to the selected audio, giving a more pleasing sounding result.
Tremolo: Tremolo enum wave, (default:Sine)
  • Sine
  • Triangle
  • Sawtooth
  • InverseSawtooth
  • Square

int phase, (default:0)
int wet, (default:0)
double lfo, (default:0)

 Modulates the volume of the selection at the depth and rate selected in the dialog. The same as the tremolo effect familiar to guitar and keyboard players.
VocalReductionAndIsolation: Vocal Reduction and Isolation enum action, (default:RemoveToMono)
  • RemoveToMono
  • Remove
  • Isolate
  • IsolateInvert
  • RemoveCenterToMono
  • RemoveCenter
  • IsolateCenter
  • IsolateCenterInvert
  • Analyze

double strength, (default:0)
double low-transition, (default:0)
double high-transition, (default:0)

 Attempts to remove or isolate center-panned audio from a stereo track. Most "Remove" options in this effect preserve the stereo image.
Vocoder: Vocoder double dst, (default:0)

enum mst, (default:BothChannels)

  • BothChannels
  • RightOnly

int bands, (default:0)
double track-vl, (default:0)
double noise-vl, (default:0)
double radar-vl, (default:0)
double radar-f, (default:0)

 Synthesizes audio (usually a voice) in the left channel of a stereo track with a carrier wave (typically white noise) in the right channel to produce a modified version of the left channel. Vocoding a normal voice with white noise will produce a robot-like voice for special effects.

Analyze Menu

The Analyze Menu contains tools for finding out about the characteristics of your audio, or labeling key feature.
Scripting Id Action Parameters Description
ManageAnalyzers: Plugin Manager none Selecting this option from the Effect Menu (or the Generate Menu or Analyze Menu) takes you to a dialog where you can enable or disable particular Effects, Generators and Analyzers in Audacity. Even if you do not add any third-party plugins, you can use this to make the Effect menu shorter or longer as required. For details see Plugin Manager.
ContrastAnalyser: Contrast none Analyzes a single mono or stereo speech track to determine the average RMS difference in volume (contrast) between foreground speech and background music, audience noise or similar. The purpose is to determine if the speech will be intelligible to the hard of hearing.
PlotSpectrum: Plot Spectrum none Takes the selected audio (which is a set of sound pressure values at points in time) and converts it to a graph of frequencies against amplitudes.
FindClipping: Find Clipping int Duty Cycle Start, (default:3)

int Duty Cycle End, (default:3)

 Displays runs of clipped samples in a Label Track, as a screen-reader accessible alternative to View > Show Clipping in Waveform. A run must include at least one clipped sample, but may include unclipped samples too.

Analyze: Nyquist

No special notes for Nyquist
Scripting Id Action Parameters Description
BeatFinder: Beat Finder int thresval, (default:0)
 Attempts to place labels at beats which are much louder than the surrounding audio. It's a fairly rough and ready tool, and will not necessarily work well on a typical modern pop music track with compressed dynamic range. If you do not get enough beats detected, try reducing the "Threshold Percentage" setting.
LabelSounds: Label Sounds double threshold, (default:0)

enum measurement, (default:peak)

  • peak
  • avg
  • rms

double sil-dur, (default:0)
double snd-dur, (default:0)
enum type, (default:before)

  • before
  • after
  • around
  • between

double pre-offset, (default:0)
double post-offset, (default:0)
string text, (default:"")

 Divides up a track by placing labels for areas of sound that are separated by silence.

Tools Menu

The Tools Menu contains customisable tools.
Scripting Id Action Parameters Description
ManageTools: Plugin Manager none Selecting this option from the Effect Menu (or the Generate Menu or Analyze Menu) takes you to a dialog where you can enable or disable particular Effects, Generators and Analyzers in Audacity. Even if you do not add any third-party plugins, you can use this to make the Effect menu shorter or longer as required. For details see Plugin Manager.
ManageMacros: Macros none Creates a new macro or edits an existing macro.
Apply Macro: Apply Macro none Displays a menu with list of all your Macros. Selecting any of these Macros by clicking on it will cause that Macro to be applied to the current project.
Screenshot: Screenshot string Path, (default:)

enum CaptureWhat, (default:Window)

  • Window
  • FullWindow
  • WindowPlus
  • Fullscreen
  • Toolbars
  • Effects
  • Scriptables
  • Preferences
  • Selectionbar
  • SpectralSelection
  • Timer
  • Tools
  • Transport
  • Mixer
  • Meter
  • PlayMeter
  • RecordMeter
  • Edit
  • Device
  • Scrub
  • Play-at-Speed
  • Trackpanel
  • Ruler
  • Tracks
  • FirstTrack
  • FirstTwoTracks
  • FirstThreeTracks
  • FirstFourTracks
  • SecondTrack
  • TracksPlus
  • FirstTrackPlus
  • AllTracks
  • AllTracksPlus

enum Background, (default:None)

  • Blue
  • White
  • None

bool ToTop, (default:True)

 A tool, mainly used in documentation, to capture screenshots of Audacity.
Benchmark: Run Benchmark none A tool for measuring the performance of one part of Audacity.
NyquistPrompt: Nyquist Prompt string Command, (default:)

int Version, (default:3)

 Brings up a dialog where you can enter Nyquist commands. Nyquist is a programming language for generating, processing and analyzing audio.
NyquistPlug-inInstaller: Nyquist Plug-in Installer string files, (default:)

enum overwrite, (default:Disallow)

  • Disallow
  • Allow
 A Nyquist plugin that simplifies the installation of other Nyquist plugins.
RegularIntervalLabels: Regular Interval Labels enum mode, (default:Both)
  • Both
  • Number
  • Interval

int totalnum, (default:0)
double interval, (default:0)
double region, (default:0)
enum adjust, (default:No)

  • No
  • Yes

string labeltext, (default:)
enum zeros, (default:TextOnly)

  • TextOnly
  • OneBefore
  • TwoBefore
  • ThreeBefore
  • OneAfter
  • TwoAfter
  • ThreeAfter

int firstnum, (default:0)
enum verbose, (default:Details)

  • Details
  • Warnings
  • None
 Places labels in a long track so as to divide it into smaller, equally sized segments.
SampleDataExport: Sample Data Export int number, (default:0)

enum units, (default:dB)

  • dB
  • Linear

string filename, (default:)
enum fileformat, (default:None)

  • None
  • Count
  • Time

enum header, (default:None)

  • None
  • Minimal
  • Standard
  • All

string optext, (default:)
enum channel-layout, (default:SameLine)

  • SameLine
  • Alternate
  • LFirst

enum messages, (default:Yes)

  • Yes
  • Errors
  • None
 Reads the values of successive samples from the selected audio and prints this data to a plain text, CSV or HTML file.
SampleDataImport: Sample Data Import string filename, (default:)

enum bad-data, (default:ThrowError)

  • ThrowError
  • ReadAsZero
 Reads numeric values from a plain ASCII text file and creates a PCM sample for each numeric value read.

Tools: Apply Macro

Displays a menu with list of all your Macros. Selecting any of these Macros by clicking on it will cause that Macro to be applied to the current project.
Scripting Id Action Parameters Description
ApplyMacrosPalette: Palette none Displays a menu with list of all your Macros which can be applied to the current project or to audio files..
Macro_FadeEnds: Fade Ends none Fades in the first second and fades out the last second of a track.
Macro_MP3Conversion: MP3 Conversion none Converts MP3.

Extra Menu

The Extra menu provides access to additional Commands that are not available in the normal default Audacity menus.
Scripting Id Action Parameters Description
PlayAtSpeed: Play-at-Speed none Extra commands related to play at speed
FullScreenOnOff: Full Screen (on/off) none Toggle full screen mode with no title bar

Extra: Transport

Extra commands related to play and record
Scripting Id Action Parameters Description
Play: Play none Play (or stop) audio
Stop: Stop none Stop audio
PlayOneSec: Play One Second none Plays for one second centered on the current mouse pointer position (not from the current cursor position). See this page for an example.
PlayToSelection: Play to Selection none Plays to or from the current mouse pointer position to or from the start or end of the selection, depending on the pointer position. See this page for more details.
PlayBeforeSelectionStart: Play Before Selection Start none Plays a short period before the start of the selected audio, the period before shares the setting of the cut preview.
PlayAfterSelectionStart: Play After Selection Start none Plays a short period after the start of the selected audio, the period after shares the setting of the cut preview.
PlayBeforeSelectionEnd: Play Before Selection End none Plays a short period before the end of the selected audio, the period before shares the setting of the cut preview.
PlayAfterSelectionEnd: Play After Selection End none Plays a short period after the end of the selected audio, the period after shares the setting of the cut preview.
PlayBeforeAndAfterSelectionStart: Play Before and After Selection Start none Plays a short period before and after the start of the selected audio, the periods before and after share the setting of the cut preview.
PlayBeforeAndAfterSelectionEnd: Play Before and After Selection End none Plays a short period before and after the end of the selected audio, the periods before and after share the setting of the cut preview.
PlayCutPreview: Play Cut Preview none Plays audio excluding the selection
ScrubBackwards: Scrub Backwards none Does nothing, is there so that users can know what the default shortcut key is, and so they can change it in Shortcuts Preferences if they want to.
ScrubForwards: Scrub Forwards none Does nothing, is there so that users can know what the default shortcut key is, and so they can change it in Shortcuts Preferences if they want to.

Extra: Tools

Extra commands to select the tool, for example time-shift, envelopes, multi-tool.
Scripting Id Action Parameters Description
SelectTool: Selection Tool none Chooses Selection tool.
EnvelopeTool: Envelope Tool none Chooses Envelope tool.
DrawTool: Draw Tool none Chooses Draw tool.
MultiTool: Multi Tool none Chooses the Multi-Tool
PrevTool: Previous Tool none Cycles backwards through the tools, starting from the currently selected tool: starting from Selection, it would navigate to Multi-tool to Zoom to Draw to Envelope to Selection.
NextTool: Next Tool none Cycles forwards through the tools, starting from the currently selected tool: starting from Selection, it would navigate to Envelope to Draw to Zoom to Multi-tool to Selection.

Extra: Mixer

Extra commands related to volume
Scripting Id Action Parameters Description
OutputGain: Adjust Playback Volume none Displays the Playback Volume dialog. You can type a new value for the playback volume (between 0 and 1), or press Tab, then use the left and right arrow keys to adjust the slider.
OutputGainInc: Increase Playback Volume none Each key press will increase the playback volume by 0.1.
OutputGainDec: Decrease Playback Volume none Each key press will decrease the playback volume by 0.1.
InputGain: Adjust Recording Volume none Displays the Recording Volume dialog. You can type a new value for the recording volume (between 0 and 1), or press Tab, then use the left and right arrow keys to adjust the slider.
InputGainInc: Increase Recording Volume none Each key press will increase the recording volume by 0.1.
InputGainDec: Decrease Recording Volume none Each key press will decrease the recording volume by 0.1.

Extra: Edit

Extra commands related to editing
Scripting Id Action Parameters Description
DeleteKey: Delete Key none Deletes the selection. When focus is in Selection Toolbar, BACKSPACE is not a shortcut but navigates back to the previous digit and sets it to zero.
DeleteKey2: Delete Key2 none Deletes the selection.
TimeShiftLeft: Time Shift Left none Moves the currently focused audio track (or a separate clip in that track which contains the editing cursor or selection region) one screen pixel to left.
TimeShiftRight: Time Shift Right none Moves the currently focused audio track (or a separate clip in that track which contains the editing cursor or selection region) one screen pixel to right.

Extra: Play-at-Speed

Extra commands related to play at speed
Scripting Id Action Parameters Description
PlayAtSpeed: Normal Play-at-Speed none Play audio at a faster or slower speed
PlayAtSpeedLooped: Loop Play-at-Speed none Combines looped play and play at speed
PlayAtSpeedCutPreview: Play Cut Preview-at-Speed none Combines cut preview and play at speed
SetPlaySpeed: Adjust Playback Speed none Displays the Playback Speed dialog. You can type a new value for the playback volume (between 0 and 1), or press Tab, then use the left and right arrow keys to adjust the slider.
PlaySpeedInc: Increase Playback Speed none Each key press will increase the playback speed by 0.1.
PlaySpeedDec: Decrease Playback Speed none Each key press will decrease the playback speed by 0.1.

Extra: Seek

Extra commands related to seeking
Scripting Id Action Parameters Description
SeekLeftShort: Short Seek Left During Playback none Skips the playback cursor back one second by default.
SeekRightShort: Short Seek Right During Playback none Skips the playback cursor forward one second by default.
SeekLeftLong: Long Seek Left During Playback none Skips the playback cursor back 15 seconds by default.
SeekRightLong: Long Seek Right During Playback none Skips the playback cursor forward 15 seconds by default.

Extra: Device

Extra commands related to selecting a device
Scripting Id Action Parameters Description
InputDevice: Change Recording Device none Displays the Select recording Device dialog for choosing the recording device, but only if the "Recording Device" dropdown menu in Audio Setup Toolbar has entries for devices. Otherwise, an recording error message will be displayed.
OutputDevice: Change Playback Device none Displays the Select Playback Device dialog for choosing the playback device, but only if the "Playback Device" dropdown menu in Audio Setup Toolbar has entries for devices. Otherwise, an error message will be displayed.
AudioHost: Change Audio Host none Displays the Select Audio Host dialog for choosing the particular interface with which Audacity communicates with your chosen playback and recording devices.
InputChannels: Change Recording Channels none Displays the Select Recording Channels dialog for choosing the number of channels to be recorded by the chosen recording device.

Extra: Selection

Scripting Id Action Parameters Description
SnapToOff: Snap-To Off none Equivalent to setting the Snap To control in Selection Toolbar to "Off".
SnapToNearest: Snap-To Nearest none Equivalent to setting the Snap To control in Selection Toolbar to "Nearest".
SnapToPrior: Snap-To Prior none Equivalent to setting the Snap To control in Selection Toolbar to "Prior".
SelStart: Selection to Start none Select from cursor to start of track
SelEnd: Selection to End none Select from cursor to end of track
SelExtLeft: Selection Extend Left none Increases the size of the selection by extending it to the left. The amount of increase is dependent on the zoom level. If there is no selection one is created starting at the cursor position.
SelExtRight: Selection Extend Right none Increases the size of the selection by extending it to the right. The amount of increase is dependent on the zoom level. If there is no selection one is created starting at the cursor position.
SelSetExtLeft: Set (or Extend) Left Selection none Extend selection left a little (is this a duplicate?)
SelSetExtRight: Set (or Extend) Right Selection none Extend selection right a litlle (is this a duplicate?)
SelCntrLeft: Selection Contract Left none Decreases the size of the selection by contracting it from the right. The amount of decrease is dependent on the zoom level. If there is no selection no action is taken.
SelCntrRight: Selection Contract Right none Decreases the size of the selection by contracting it from the left. The amount of decrease is dependent on the zoom level. If there is no selection no action is taken.
MoveToPrevLabel: Move to Previous Label none Moves selection to the previous label
MoveToNextLabel: Move to Next Label none Moves selection to the next label

Extra: Timeline

Extra commands related to changing the format of the Timeline
Scripting Id Action Parameters Description
MinutesandSeconds: Minutes and Seconds none Changes the Timeline display format to Minutes and Seconds (default setting).
BeatsandMeasures: Beats and Measures none Changes the Timeline display format to Beats and Measures.

Extra: Focus

Extra commands to set focus, usually focus on one track
Scripting Id Action Parameters Description
PrevFrame: Move Backward from Toolbars to Tracks none Move backward through currently focused toolbar in Upper Toolbar dock area, Track View and currently focused toolbar in Lower Toolbar dock area. Each use moves the keyboard focus as indicated.
NextFrame: Move Forward from Toolbars to Tracks none Move forward through currently focused toolbar in Upper Toolbar dock area, Track View and currently focused toolbar in Lower Toolbar dock area. Each use moves the keyboard focus as indicated.
PrevTrack: Move Focus to Previous Track none Focus one track up
NextTrack: Move Focus to Next Track none Focus one track down
FirstTrack: Move Focus to First Track none Focus on first track
LastTrack: Move Focus to Last Track none Focus on last track
ShiftUp: Move Focus to Previous and Select none Focus one track up and select it
ShiftDown: Move Focus to Next and Select none Focus one track down and select it
Toggle: Toggle Focused Track none Toggle focus on current track
ToggleAlt: Toggle Focused Track none Toggle focus on current track

Extra: Cursor

Extra commands to move the cursor
Scripting Id Action Parameters Description
CursorLeft: Cursor Left none When not playing audio, moves the editing cursor one screen pixel to left. When a Snap option is chosen, moves the cursor to the preceding unit of time as determined by the current selection format. If the key is held down, the cursor speed depends on the length of the tracks. When playing audio, moves the playback cursor as described at "Cursor Short Jump Left"
CursorRight: Cursor Right none When not playing audio, moves the editing cursor one screen pixel to right. When a Snap option is chosen, moves the cursor to the following unit of time as determined by the current selection format. If the key is held down, the cursor speed depends on the length of the tracks. When playing audio, moves the playback cursor as described at "Cursor Short Jump Right"
CursorShortJumpLeft: Cursor Short Jump Left none When not playing audio, moves the editing cursor one second left by default. When playing audio, moves the playback cursor one second left by default. The default value can be changed by adjusting the "Short Period" under "Seek Time when playing" in Playback Preferences.
CursorShortJumpRight: Cursor Short Jump Right none When not playing audio, moves the editing cursor one second right by default. When playing audio, moves the playback cursor one second right by default. The default value can be changed by adjusting the "Short Period" under "Seek Time when playing" in Playback Preferences.
CursorLongJumpLeft: Cursor Long Jump Left none When not playing audio, moves the editing cursor 15 seconds left by default. When playing audio, moves the playback cursor 15 seconds left by default. The default value can be changed by adjusting the "Long Period" under "Seek Time when playing" in Playback Preferences.
CursorLongJumpRight: Cursor Long Jump Right none When not playing audio, moves the editing cursor 15 seconds right by default. When playing audio, moves the playback cursor 15 seconds right by default. The default value can be changed by adjusting the "Long Period" under "Seek Time when playing" in Playback Preferences.
ClipLeft: Clip Left none Moves the currently focused audio track (or a separate clip in that track which contains the editing cursor or selection region) one screen pixel to left.
ClipRight: Clip Right none Moves the currently focused audio track (or a separate clip in that track which contains the editing cursor or selection region) one screen pixel to right.

Extra: Track

Extra commands to operate on a track that has focus
Scripting Id Action Parameters Description
TrackPan: Change Pan on Focused Track none Brings up the Pan dialog for the focused track where you can enter a pan value, or use the slider for finer control of panning than is available when using the track pan slider.
TrackPanLeft: Pan Left on Focused Track none Controls the pan slider on the focused track. Each keypress changes the pan value by 10% left.
TrackPanRight: Pan Right on Focused Track none Controls the pan slider on the focused track. Each keypress changes the pan value by 10% right.
TrackGain: Change Gain on Focused Track none Brings up the Gain dialog for the focused track where you can enter a gain value, or use the slider for finer control of gain than is available when using the track pan slider.
TrackGainInc: Increase Gain on Focused Track none Controls the gain slider on the focused track. Each keypress increases the gain value by 1 dB.
TrackGainDec: Decrease Gain on Focused Track none Controls the gain slider on the focused track. Each keypress decreases the gain value by 1 dB.
TrackMenu: Open Menu on Focused Track none Opens the Audio Track Dropdown Menu on the focused audio track or other track type. In the audio track dropdown, use Up, and Down, arrow keys to navigate the menu and Enter, to select a menu item. Use Right, arrow to open the "Set Sample Format" and "Set Rate" choices or Left, arrow to leave those choices.
TrackMute: Mute/Unmute Focused Track none Toggles the Mute button on the focused track.
TrackSolo: Solo/Unsolo Focused Track none Toggles the Solo button on the focused track.
TrackClose: Close Focused Track none Close (remove) the focused track only.
TrackMoveUp: Move Focused Track Up none Moves the focused track up by one track and moves the focus there.
TrackMoveDown: Move Focused Track Down none Moves the focused track down by one track and moves the focus there.
TrackMoveTop: Move Focused Track to Top none Moves the focused track up to the top of the track table and moves the focus there.
TrackMoveBottom: Move Focused Track to Bottom none Moves the focused track down to the bottom of the track table and moves the focus there.

Extra: Scriptables I

These commands were originally written for scripting Audacity, e.g via a Python script that uses mod-script-pipe. The commands though are also present in the menu, available from macros, and available from within Nyquist using (AUD-DO "command")
Scripting Id Action Parameters Description
SelectTime: Select Time double Start, (default:unchanged)

double End, (default:unchanged)
enum RelativeTo, (default:unchanged)

  • ProjectStart
  • Project
  • ProjectEnd
  • SelectionStart
  • Selection
  • SelectionEnd
 Modifies the temporal selection. Start and End are time. FromEnd allows selection from the end, which is handy to fade in and fade out a track.

Note carefully that the Start time should be a negative number relative to the chosen start position.

SelectFrequencies: Select Frequencies double High, (default:unchanged)

double Low, (default:unchanged)

 Modifies what frequencies are selected. High and Low are for spectral selection.
SelectTracks: Select Tracks double Track, (default:unchanged)

double TrackCount, (default:unchanged)
enum Mode, (default:unchanged)

  • Set
  • Add
  • Remove
 Modifies which tracks are selected. First and Last are track numbers. High and Low are for spectral selection. The Mode parameter allows complex selections, e.g adding or removing tracks from the current selection.
SetTrackStatus: Set Track Status string Name, (default:unchanged)

bool Selected, (default:unchanged)
bool Focused, (default:unchanged)

 Sets properties for a track or channel (or both).Name is used to set the name. It is not used in choosing the track.
SetTrackAudio: Set Track Audio bool Mute, (default:unchanged)

bool Solo, (default:unchanged)
double Gain, (default:unchanged)
double Pan, (default:unchanged)

 Sets properties for a track or channel (or both). Can set pan, gain, mute and solo.
SetTrackVisuals: Set Track Visuals int Height, (default:unchanged)

enum Display, (default:unchanged)

  • Waveform
  • Spectrogram
  • Multi-view

enum Scale, (default:unchanged)

  • Linear
  • dB

enum Color, (default:unchanged)

  • Color0
  • Color1
  • Color2
  • Color3

enum VZoom, (default:unchanged)

  • Reset
  • Times2
  • HalfWave

double VZoomHigh, (default:unchanged)
double VZoomLow, (default:unchanged)
bool SpecPrefs, (default:unchanged)
bool SpectralSel, (default:unchanged)
enum Scheme, (default:unchanged)

  • Color (default)
  • Color (classic)
  • Grayscale
  • Inverse Grayscale
 Sets visual properties for a track or channel (or both). SpectralPrefs=1 sets the track to use general preferences, SpectralPrefs=1 per track prefs. When using general preferences, SetPreferences can be used to change a preference and so affect display of the track.
GetPreference: Get Preference string Name, (default:)
 Gets a single preference setting.
SetPreference: Set Preference string Name, (default:)

string Value, (default:)
bool Reload, (default:False)

 Sets a single preference setting. Some settings such as them changes require a reload (use Reload=1), but this takes time and slows down a script.
SetClip: Set Clip double At, (default:unchanged)

enum Color, (default:unchanged)

  • Color0
  • Color1
  • Color2
  • Color3

double Start, (default:unchanged)

 Modify a clip by stating the track or channel a time within it. Color and start position can be set. Try to avoid overlapping clips, as Audacity will allow it, but does not like them.
SetEnvelope: Set Envelope double Time, (default:unchanged)

double Value, (default:unchanged)
bool Delete, (default:unchanged)

 Modify an envelope by specifying a track or channel and a time within it. You cannot yet delete individual envelope points, but can delete the whole envelope using Delete=1.
SetLabel: Set Label int Label, (default:0)

string Text, (default:unchanged)
double Start, (default:unchanged)
double End, (default:unchanged)
bool Selected, (default:unchanged)

 Modifies an existing label. You must give it the label number.
SetProject: Set Project string Name, (default:unchanged)

double Rate, (default:unchanged)
int X, (default:unchanged)
int Y, (default:unchanged)
int Width, (default:unchanged)
int Height, (default:unchanged)

 Sets the project window to a particular location and size. Can also change the caption - but that is cosmetic and may be overwritten again later by Audacity.

Extra: Scriptables II

Like Scriptables I, but these ones are less commonly used from the menu.
Scripting Id Action Parameters Description
Select: Select double Start, (default:unchanged)

double End, (default:unchanged)
enum RelativeTo, (default:unchanged)

  • ProjectStart
  • Project
  • ProjectEnd
  • SelectionStart
  • Selection
  • SelectionEnd

double High, (default:unchanged)
double Low, (default:unchanged)
double Track, (default:unchanged)
double TrackCount, (default:unchanged)
enum Mode, (default:unchanged)

  • Set
  • Add
  • Remove
 Selects audio. Start and End are time. First and Last are track numbers. High and Low are for spectral selection. FromEnd allows selection from the end, which is handy to fade in and fade out a track. The Mode parameter allows complex selections, e.g adding or removing tracks from the current selection.
SetTrack: Set Track string Name, (default:unchanged)

bool Selected, (default:unchanged)
bool Focused, (default:unchanged)
bool Mute, (default:unchanged)
bool Solo, (default:unchanged)
double Gain, (default:unchanged)
double Pan, (default:unchanged)
int Height, (default:unchanged)
enum Display, (default:unchanged)

  • Waveform
  • Spectrogram

enum Scale, (default:unchanged)

  • Linear
  • dB

enum Color, (default:unchanged)

  • Color0
  • Color1
  • Color2
  • Color3

enum VZoom, (default:unchanged)

  • Reset
  • Times2
  • HalfWave

double VZoomHigh, (default:unchanged)
double VZoomLow, (default:unchanged)
bool SpecPrefs, (default:unchanged)
bool SpectralSel, (default:unchanged)
bool GrayScale, (default:unchanged)

 Sets properties for a track or channel (or both). Setting one channel of a stereo track can lead to interesting results. That's most used when setting relative sizing of the two channels. SpectralPrefs=1 sets the track to use general preferences, SpectralPrefs=1 per track prefs. When using general preferences, SetPreferences can be used to change a preference and so affect display of the track. Name is used to set the name. It is not used in choosing the track.
GetInfo: Get Info enum Type, (default:Commands)
  • Commands
  • Menus
  • Preferences
  • Tracks
  • Clips
  • Envelopes
  • Labels
  • Boxes

enum Format, (default:JSON)

  • JSON
  • LISP
  • Brief
 Gets information in a list in one of three formats.
Message: Message string Text, (default:Some message)
 Used in testing. Sends the Text string back to you.
Help: Help string Command, (default:Help)

enum Format, (default:JSON)

  • JSON
  • LISP
  • Brief
 This is an extract from GetInfo Commands, with just one command.
Import2: Import string Filename, (default:)
 Imports from a file. The automation command uses a text box to get the file name rather than a normal file-open dialog.
Export2: Export string Filename, (default:exported.wav)

int NumChannels, (default:1)

 Exports selected audio to a named file. This version of export has the full set of export options. However, a current limitation is that the detailed option settings are always stored to and taken from saved preferences. The net effect is that for a given format, the most recently used options for that format will be used. In the current implementation, NumChannels should be 1 (mono) or 2 (stereo).
OpenProject2: Open Project string Filename, (default:test.aup3)

bool AddToHistory, (default:false)

 Opens a project.
SaveProject2: Save Project string Filename, (default:name.aup3)

bool AddToHistory, (default:False)
bool Compress, (default:False)

 Saves a project.
Drag: Move Mouse int Id, (default:unchanged)

string Window, (default:unchanged)
double FromX, (default:unchanged)
double FromY, (default:unchanged)
double ToX, (default:unchanged)
double ToY, (default:unchanged)
enum RelativeTo, (default:unchanged)

  • Panel
  • App
  • Track0
  • Track1
 Experimental command (called Drag in scripting) that moves the mouse. An Id can be used to move the mouse into a button to get the hover effect. Window names can be used instead. If To is specified, the command does a drag, otherwise just a hover.
CompareAudio: Compare Audio float Threshold, (default:0)
 Compares selected range on two tracks. Reports on the differences and similarities.
Screenshot: Screenshot (short format) none A version of Tools -> Screenshot with a more minimal GUI. One of the most useful options is All_Tracks. The _Plus suffix includes the timeline.

Help Menu

The Help Menu lets you find out more about the Audacity application and how to use it. It also includes some diagnostic tools.
Scripting Id Action Parameters Description
QuickHelp: Quick Help none A brief version of help with some of the most essential information.
Manual: Manual none Opens the manual in the default browser.
Updates: Check for Updates none Checks online to see if this is the latest version of Audacity.
About: About Audacity none Brings a dialog with information about Audacity, such as who wrote it, what features are enabled and the GNU GPL v2 license.

Help: Diagnostics

A set of diagnostic tools
Scripting Id Action Parameters Description
DeviceInfo: Audio Device Info none Shows technical information about your detected audio device(s).
MidiDeviceInfo: MIDI Device Info none Shows technical information about your detected MIDI device(s).
Log: Show Log none Launches the "Audacity Log" window, the log is largely a debugging aid, having timestamps for each entry
CrashReport: Generate Support Data none Selecting this will generate a Debug report which could be useful in aiding the developers to identify bugs in Audacity or in third-party plugins
CheckDeps: Check Dependencies none Lists any WAV or AIFF audio files that your project depends on, and allows you to copy these files into the project


No Menu

These are additional commands that do not appear in any menu
Scripting Id Action Parameters Description
PrevWindow: Previous Window none Navigates to the previous window.
NextWindow: Next Window none Navigates to the next window.