2.17.5: In progress... NEW: PlutoSDR and LimeSDR support in AppImage release, via SoapySDR. NEW: Airspy support in Windows binary release. IMPROVED: Updated GNU Radio, SDR driver, and Qt versions in AppImage release. FIXED: Respond correctly to pipelined remote control commands. REMOVED: FreeSRP support in AppImage release. 2.17.4: Released February 9, 2024 NEW: Experimental Windows binary release (RTL-SDR only). IMPROVED: Respond to \chk_vfo remote command (needed by some clients). IMPROVED: Respond to \get_powerstat remote command (needed by some clients). 2.17.3: Released October 20, 2023 FIXED: Delete key shortcut for bookmark removal. 2.17.2: Released October 9, 2023 NEW: FORCE_QT6 and FORCE_QT5 CMake options to force Qt version. 2.17.1: Released October 9, 2023 NEW: Delete key clears the waterfall. NEW: I/Q tool can save recordings in SigMF format. NEW: Holding Ctrl speeds up mouse wheel zoom. IMPROVED: Reduced CPU utilization of waterfall display. CHANGED: DMG release requires macOS 12.7 or later. 2.17: Released October 1, 2023 NEW: "Avg" plot mode, which displays average of FFT bins. NEW: "Fill" plot mode, which displays both maximum & average of FFT bins. NEW: "Histogram" plot mode, which displays distribution of FFT bins. NEW: Selectable plot scaling: dBFS, dBV/RBW, dbV/√Hz, dBm/RBW, dBm/Hz. NEW: Min hold line in plot. NEW: A/B measurement markers on plot. NEW: Plot tooltip displays delta from demod frequency. NEW: Dropped frames are indicated by red background in FFT Settings panel. NEW: "Avg" waterfall mode, which displays average of FFT bins. NEW: "Sync" waterfall mode, which mirrors averaged data from plot. NEW: Support for RTL-SDR Blog V4 in AppImage and DMG releases. NEW: Save FFT plot center frequency in settings. IMPROVED: Peak detection algorithm. IMPROVED: Peak detection uses peak hold data when available. IMPROVED: Maximum FFT size increased to 4M. IMPROVED: Maximum frame rate increased to 500. IMPROVED: Averaging slider is consistent across frame rates. IMPROVED: Visibility of text in axes. IMPROVED: Full support for high-DPI screens in plot & waterfall. IMPROVED: Plot & waterfall performance. IMPROVED: Plot can be zoomed & resized while DSP is stopped. IMPROVED: FFT window setting is stored as a string. IMPROVED: Waterfall span setting is stored in milliseconds. IMPROVED: Added 6 dB attenuation to WAV file recordings to prevent clipping. IMPROVED: Use logarithmic scale for frequency zoom slider. IMPROVED: Reduced CPU utilization of demodulators. IMPROVED: Properly handle smooth scrolling. IMPROVED: Shorten band names to fit in narrow spaces. IMPROVED: Delay plot & waterfall drawing until samples arrive from hardware. CHANGED: Frequency zoom slider zooms around center of display. CHANGED: Disallow scrolling beyond the FFT frequency limits. CHANGED: Default narrow FM deviation increased to 5 kHz. FIXED: Time on waterfall is calculated correctly. FIXED: Frequency is correctly rounded in I/Q filenames. FIXED: Crash in AFSK1200 decoder. FIXED: Hang when setting a very narrow filter width. FIXED: Inconsistent 1-2-5 scaling of amplitude axis. REMOVED: "Save waterfall" feature. 2.16: Released April 28, 2023 NEW: Restore AM & AM-Sync settings between sessions. NEW: Set/get audio gain via remote control. NEW: Only show bookmarks for active tag groups in the panadapter. FIXED: Loading of narrow FM tau setting. FIXED: Crash when adding or removing bookmark tags. FIXED: Redraw bookmarks immediately after changes. FIXED: DX cluster spots fail to expire around midnight. FIXED: AGC sensitivity bug introduced in version 2.15.10. IMPROVED: Rendering of frequency control and S-meter on some high-DPI screens. REMOVED: Support for GNU Radio 3.7. 2.15.10: Released April 13, 2023 NEW: Restore FFT zoom level between sessions. NEW: Restore peak detect & peak hold between sessions. NEW: "Z" keyboard shortcut sets frequency offset to zero. FIXED: Remove empty frame from bottom of I/Q tool window. FIXED: Sudden scrolling of file list in I/Q tool window. FIXED: Reset zoom slider after right click on panadapter / waterfall. FIXED: Aliasing when input rate is higher than 2 Msps. IMPROVED: AGC performance. IMPROVED: WFM stereo & OIRT performance. IMPROVED: I/Q swap performance. IMPROVED: Apply amplitude normalization to FFT window functions. 2.15.9: Released April 9, 2022 NEW: Qt 6 support. FIXED: Slider widgets don't work correctly on MacOS Monterey. 2.15.8: Released January 25, 2022 FIXED: Crash when DSP is restarted after a long pause. FIXED: Remove usage of deprecated Qt APIs. FIXED: Return correct RDS status in remote control. IMPROVED: Allow ordinary IP addresses to be used in remote control settings. 2.15.7: Released January 23, 2022 FIXED: Errors & warnings in appstream metadata & desktop entry. 2.15.6: Released January 22, 2022 IMPROVED: Install icon, desktop entry, and appstream metadata. 2.15.5: Released January 20, 2022 FIXED: Use correct categories in desktop entry file. 2.15.4: Released January 15, 2022 FIXED: Audio is delayed when FFT size is changed. 2.15.3: Released January 15, 2022 FIXED: RDS receiver skips some messages. FIXED: Buffer overruns in AFSK1200 decoder. FIXED: Crash when opening APSK1200 decoder with demod off. IMPROVED: FFT and S-meter performance. IMPROVED: Reduced FFT memory usage. IMPROVED: Increased S-meter resolution to 0.1 dB. IMPROVED: Accuracy of S-meter display. 2.15.2: Released January 8, 2022 NEW: Save & restore center frequency when playing I/Q files. FIXED: Device selection fails for some SoapySDR devices. FIXED: Segfault when starting AppImage on some systems. FIXED: Crash/freeze after stopping audio recorder or AFSK1200 decoder. IMPROVED: Frequency accuracy of plots at high zoom levels. 2.15.1: Released December 18, 2021 FIXED: DSP stops when device is changed. FIXED: USB error when device settings are changed. FIXED: Changing frequency using the keyboard doesn't work on MacOS. 2.15: Released December 15, 2021 NEW: Start/stop RDS and fetch Program Identification via remote control. NEW: Added IQ balancing to MacOS release. FIXED: Erratic behaviour of S-meter. FIXED: Compilation error due to missing include. FIXED: Startup crash on Windows. FIXED: I/Q playback when filename contains special characters. IMPROVED: Reordered the receiver mode drop-down list. IMPROVED: Receiver mode is now stored as a string in settings files. IMPROVED: Increased automatic squelch margin to 3 dB. 2.14.6: Released October 6, 2021 FIXED: SoapyPlutoSDR driver on MacOS. IMPROVED: MacOS releases are now signed & notarized. 2.14.5: Released October 3, 2021 NEW: Added SoapyRemote to AppImage and DMG releases. NEW: Added SoapyPlutoSDR to DMG release. NEW: Preliminary support for GNU Radio 3.10. FIXED: Compatibility with case-sensitive filesystems on MacOS. IMPROVED: Better reception of RDS signals. 2.14.4: Released December 28, 2020 NEW: Many more keyboard shortcuts. NEW: Display filename when recording audio. FIXED: Audio output doesn't work on MacOS Big Sur. FIXED: DC remove button doesn't work when Demod Off mode is selected. IMPROVED: Better demodulation of FM stereo signals. 2.14.3: Released December 9, 2020 FIXED: Lock button in Audio options dialog is always shaded on MacOS. FIXED: Restored Airspy HF and BladeRF support in MacOS builds. FIXED: Restored frequency tooltips on MacOS. FIXED: Monospace text displayed incorrectly on MacOS. IMPROVED: Better rendering on high-DPI screens. 2.14.2: Released December 3, 2020 NEW: Added button to lock audio FFT and waterfall ranges. FIXED: Crash when invalid device string is entered. FIXED: Receiver starts unexpectedly when "Enable RDS" is checked. FIXED: Invert scrolling option doesn't apply to audio FFT. 2.14.1: Released November 27, 2020 FIXED: Hardware retuning when dragging frequency axis with center button. FIXED: Removed non-functional Plot button from I/Q recording dialog. FIXED: Start DSP when Play button in I/Q recording dialog is clicked. FIXED: Tooltip for Rec button in I/Q recording dialog. IMPROVED: More accurate rendering of FFT fill. IMPROVED: Better rendering of amplitude axis. IMPROVED: Allow debug logging to be enabled at runtime. 2.14: Released November 19, 2020 NEW: Start/stop DSP via remote control. NEW: Device scan button in Configure I/O devices dialog. NEW: Added "Recent settings" menu. NEW: Added synchronous AM demodulator. NEW: Added band plan to bottom of FFT. NEW: Added support for DX cluster. NEW: Added "F" shortcut to select the frequency controller. FIXED: PortAudio detection on MacOS. FIXED: Crash when closing AFSK1200 decoder. IMPROVED: Make axes take precedence over demod box in plotter. 2.13.5: Released November 7, 2020 FIXED: Set correct buffer size for audio FFT. 2.13.4: Released November 6, 2020 NEW: Added man page for use by distributions. FIXED: Crash when time span is set and waterfall height is set to 0%. FIXED: Filter width is incorrectly set when demod is off. IMPROVED: Removed Boost.Format dependency. 2.13.3: Released November 1, 2020 FIXED: Crash when waterfall height is set to 100%. IMPROVED: Removed Boost.Program_options dependency. 2.13.2: Released October 24, 2020 NEW: Preliminary support for GNU Radio 3.9. NEW: Print UDP configuration. NEW: Viridis color map. FIXED: Loss of precision in the plotter's frequency axis. FIXED: Usability on smaller screen sizes. 2.13.1: Released October 17, 2020 FIXED: Crash when invalid sample rate is specified. FIXED: Decrease minimum size of FFT Settings panel. FIXED: Typos. IMPROVED: More Airspy HF+ sample rates added. 2.13: Released October 16, 2020 NEW: Stereo option for UDP streaming. NEW: Script to generate AppImage. NEW: Allow scroll wheel direction to be inverted. FIXED: FM de-emphasis causing audio to be 20 dB quieter than it should be. FIXED: FM de-emphasis applied incorrectly in WFM stereo receiver. FIXED: Update waterfall time resolution when FFT settings are changed. FIXED: Update waterfall time resolution when window is resized. FIXED: Restore waterfall time span between sessions. FIXED: FFT buffer overlap calculation. FIXED: Crash when launching without device connected. FIXED: Crash when setting invalid RF gains. FIXED: Audio panadapter / waterfall slider direction. FIXED: Clear FFT averages when changing FFT size. FIXED: Crash when source block doesn't support IQ balancing. FIXED: Bookmark labels in FFT draw over each other. IMPROVED: DSP and FFT performance. IMPROVED: Panadapter & waterfall performance. IMPROVED: Smooth panadapter & waterfall redrawing. IMPROVED: Better default values for various settings. IMPROVED: Audio waterfall colormap matches I/Q waterfall. IMPROVED: Use all available display space for panadapter & waterfall. IMPROVED: Updated RDS decoder. IMPROVED: More Airspy HF+ sample rates added. 2.12.1: Released January 27, 2020 NEW: White Hot, Black Hot and White Hot compressed colormaps. 2.12: Released January 26, 2020 NEW: GNU Radio 3.8 support. NEW: Mute button in audio panel. NEW: Google Turbo and Plasma color maps. NEW: Set/get device gains via remote control. FIXED: FFT display sometimes disappears. FIXED: Crash on startup when using HackRF. FIXED: dB scale disappears when zooming to 1 dB per grid line. FIXED: Raw I/Q output missing one channel. FIXED: Trap exceptions and show a message instead of crashing. IMPROVED: Prevent zooming out too far. IMPROVED: Make unlit digits slightly visible. IMPROVED: Only show sample rates supported by both models of BladeRF. 2.11.5: Released May 17, 2018 FIXED: Crash in remote control 'q' command. 2.11.4: Released April 17, 2018 FIXED: Reduced size of color selector button in bookmarks tag list. 2.11.3: Released April 13, 2018 FIXED: Memory leak in remote control interface. IMPROVED: Add backspace key to frequency controller. 2.11.2: Released March 24, 2018 FIXED: Layout on low resolution monitors. 2.11.1: Released March 18, 2018 FIXED: Removed visible border around frequency and meter widgets. 2.11: Released March 18, 2018 NEW: Selectable IQ FFT window type. FIXED: Problems on Mac Pro computers without built-in audio. FIXED: Black on black tooltips in the main window. FIXED: Auto-squelch sets 0 dBFS too often. FIXED: Can not play I/Q files if path contains a space. FIXED: Restore gains to slider states when hardware AGC is disabled. FIXED: Crash on startup when audio output device is gone (Mac OS X). FIXED: Filter offset no longer limited to +/- 9.999999 MHz. IMPROVED: Default FFT window for reduced spectral leakage. IMPROVED: Visual indicator of squelch level in the signal meter. IMPROVED: Show configuration file path when listing config files using -l IMPROVED: Microtelecom Perseus integration. IMPROVED: Implemented PPM correction for RF Space Cloud IQ (gr-osmosdr-gqrx) IMPROVED: Implemented PPM correction for PlutoSDR (gr-osmosdr-gqrx) 2.10: Released January 21, 2018 FIXED: Crash when starting gqrx using hackrf. FIXED: Spelling errors. IMPROVED: SDRPlay integration. 2.9: Released November 11, 2017 NEW: Airspy HF+ support. FIXED: Always save TCP and UDP host settings. FIXED: Application hangs when pulseaudio server is not running. 2.8: Released September 16, 2017 NEW: Remote control command to set LNB LO (LNB_LO). FIXED: Inactive Start DSP and Config buttons in toolbar. FIXED: Frequency controller digit not redrawn after a resize. FIXED: Set default mode to AM instead of none. IMPROVED: Detection of gr-osmosdr when installed in custom directory. IMPROVED: Remote frequency handling. 2.7: Released August 19, 2017 NEW: Airspy HF+ integration. NEW: PlutoSDR integration. NEW: Restore filter low cut and high cut between sessions. NEW: Restore FM parameters between sessions. NEW: Restore remote control state between sessions. NEW: Support for passband when setting mode through remote. NEW: Widget to enter receiver frequency. NEW: Button to reset squelch to its default (-150 dB) value. FIXED: Keep waterfall zoom level and zoom slider synchronised. FIXED: RDS status is not kept while jumping through bookmark. FIXED: .conf files are deleted when changes are saved. FIXED: Remote control not working if $http_proxy is set. FIXED: Audio rec does not work after trying to play deleted file. FIXED: QtSvg dependency. IMPROVED: Tuning through the remote control interface. IMPROVED: Increase narrow band receiver rate to 96 ksps (for APT). IMPROVED: LimeSDR integration. IMPROVED: Voiceover interface. IMPROVED: Input decimator performance. IMPROVED: Increased frequency limit to 999 GHz (500 GHz LO). IMPROVED: Hamradio style frequency display. IMPROVED: More short waterfall time spans. 2.6.1: Released February 16, 2017 IMPROVED: Option for reverting the behavior of the frequency controller. 2.6: Released October 3, 2016 NEW: 1-2-5 scaling on FFT axis. NEW: Audio waterfall. NEW: Remember AGC settings between sessions. NEW: Right-click on FFT resets frequency zoom. NEW: Separate dB ranges for pandapter and waterfall. NEW: Raw I/Q mode. NEW: Portaudio support. NEW: Command line option to set Qt style (fusion, windows, ...) FIXED: Stuttering audio with Pulseaudio backend. FIXED: Use system font on FFT plot (too small font on high res displays). FIXED: Broken FUNcube Dongle Pro+ support on Mac OS X 10.11.4. FIXED: Correct display of negative offsets between -1 and 0 kHz. FIXED: Reset frequency digits below the one that is being changed. FIXED: LNB LO could not be set from I/O configuration dialog. FIXED: Update squelch level when switching between demodulators. FIXED: Set correct filter range when loading bookmark. FIXED: White area on waterfall. FIXED: RFSpace Cloud-IQ support on Mac OS X and in PPA IMPROVED: Input decimator performance. IMPROVED: SDRPlay integration. IMPROVED: Only probe for devices when the program is started. IMPROVED: 1-2-5 scaling on FFT axis. IMPROVED: Allow user to enter ALSA device name. IMPROVED: Set default audio FFT range to -70...0 dB. IMPROVED: Restore audio FFT dB scaling between sessions. 2.5.3: Released February 3, 2016 NEW: Set and read squelch via remote control socket. FIXED: Toolbar appearance on Mac OS X. IMPROVED: Reworked CW reception so that channel is now centered on carrier. IMPROVED: Shortcuts to view/hide some of the dock widgets. IMPROVED: Respond to \dump_state remote command (needed by some clients). IMPROVED: Read remote frequency as double for rigctl compatibility. 2.5.2: Released January 21, 2016 NEW: Support for Red Pitaya (RX only). NEW: Build with GNU Radio 3.7.9. IMPROVED: Increased spacing between frequency divisions to prevent overlap. IMPROVED: Reduced minimum window size requirement to around 800x600 pixels. 2.5: Released January 7, 2016 NEW: Read out signal time and on the waterfall (disabled on OS X). NEW: Save waterfall to graphics file. NEW: Allow user settable waterfall time span (up to 24 hours). NEW: Cmake option to build using gr-audio backend (Andrea Merello). FIXED: FM stereo (revert to pre-2.4 behavior). FIXED: Mode selector not updated when selecting a WFM OIRT bookmark. FIXED: Show correct filter preset when filter LO/HI corresponds to one. FIXED: Prevent RDS panel from growing by making it scrollable. FIXED: Use correct audio backend on OS X (app bundle only). IMPROVED: Button layouts (mostly on Mac OS X). 2.4: Released December 14, 2015 NEW: Bookmarks. NEW: FM RDS decoder using gr-rds. NEW: Frequency tooltips on the FFT area (disabled on Mac). NEW: Filter shape selector (soft, normal, sharp). NEW: Slider to aid zooming on the frequency and dB axes. NEW: RFSpace Cloud-IQ support. NEW: OIRT stereo decoder (Daniil Cherednik). NEW: Input decimator. FIXED: Prevent crash due to device errors while starting the application. FIXED: Use hardware frequency in IQ file names. FIXED: FFT averaging (it can now be disabled). FIXED: "Could not resolve pattern10600" error messages in the terminal. FIXED: Antenna selection error with USRP B210 (Ethan Trewhitt). FIXED: LNB LO value not updated in I/O config dialog. FIXED: Initial gain of rtlsdr devices is no longer 0 dB. FIXED: DSP freeze when setting FM de-emphasis time constant to 0. FIXED: Use correct main category in desktop entry file. IMPROVED: Support up to 1M point FFT. IMPROVED: Fractional PPM correction. IMPROVED: AGC performance. IMPROVED: FFT performance. IMPROVED: Right click on frequency digit to clear digits. IMPROVED: Robustness against malformed remote control commands. 2.3.2: Released November 28, 2014 FIXED: Pandapter and waterfall widths are limited to 4096 pixels. IMPROVED: Add 2.5 Msps preset for Airspy. 2.3.1: Released August 8, 2014 FIXED: Use correct categories in .desktop file. 2.3.0: Released August 5, 2014 NEW: Support for setting analog bandwidth. NEW: Support for setting gain stages individually. NEW: Remember visibility status of main toolbar. NEW: Restore the geometry of the main window between sessions. NEW: Restore the state and placement of the dock windows. NEW: Nuand BladeRF support. NEW: RF Space SDR-IQ, SDR-IP and Netsdr support. NEW: Airspy support. NEW: Peak detection on the FFT plot. NEW: Max hold on the FFT plot. NEW: Audio streaming over UDP socket. NEW: Remote control through TCP socket. NEW: Set squelch level from current signal/noise level. NEW: Command line option to list existing configurations. NEW: I/Q recording and playback. FIXED: Incorrect handling of decimal values in LNB LO frequency. FIXED: Correctly apply initial LNB LO frequency. FIXED: Audio output device selection on Mac OS X. FIXED: Properly store settings when using Save As function. FIXED: Crash when recording audio with no rec directory set. FIXED: Only allow audio playback while DSP is running. FIXED: Ensure DSP is stopped when we exit. FIXED: Freeze when switching modes after audio recording. FIXED: Toggling "ignore limits" changes frequency. FIXED: Include gqrx.desktop file. FIXED: Rename scope.svg to gqrx.svg to avoid confusion. IMPROVED: Gqrx can fit on small screens (900x600 pixels). IMPROVED: Better color gradient for the waterfall. IMPROVED: FFT presentation at high rates and high sizes. IMPROVED: Make release news available through the Help menu. 2.2.0: Released August 8, 2013 NEW: Official Ubuntu PPA and Mac OS X app bundle. NEW: Allow using audio output devices other than the default. NEW: Automatic I/Q phase and gain correction (requires gr-iqbal). NEW: Qt 5 support. NEW: GNU Radio 3.7 support. NEW: HackRF Jawbreaker support. NEW: Funcube Dongle Pro+ support. NEW: Option to select antenna connector on e.g. USRP devices. NEW: Configuration option to choose location of WAV recordings. NEW: Uses gr-audio as default on all platform (pulseaudio still possible). NEW: Command line option to remove configuration file. NEW: Command line option to launch I/O device editor before application. FIXED: Frequency control widget with recent Qt was broken. FIXED: Bug that caused audio FFT data to be leaked into the I/Q FFT. FIXED: Audio recording & playback. FIXED: Proper handling of frequencies above 2147483647 Hz. IMPROVED: Y-axis panning (click-and-drag). IMPROVED: Rescale waterfall when resizing the main window. IMPROVED: gr-audio support on Linux. IMPROVED: Audio gain setting no longer has impact on WAV recording. 2.1.251: Released March 1, 2013 FIXED: Incorrect device selection in config dialog. 2.1.246: Released February 29, 2013 NEW: I/Q swapping option. NEW: FFT video filter with non-linear gain (still WIP). NEW: Save and restore FFT settings. NEW: Save and restore receiver options (offset, mode and squelch level). NEW: AM DC removal using IIR filter. FIXED: Removed graphics redraw delay when changing frequency or demodulator. FIXED: Respect RF frequency range of input device. FIXED: Added workaround for pixel error introduced in Qt 4.8. FIXED: Crash when FFT size is smaller than plot width. FIXED: Show correct initial filter preset in filter selector. FIXED: Workaround for 'jerky streaming' when DSP is started using rtlsdr. FIXED: Freeze when channel filter becomes too narrow in AM and FM modes. FIXED: Crash when changing sample rate of the current input device. CHANGED: Show device ID (e.g. rtl=0) in title bar instead of description. IMPROVED: AGC settings moved to dialog window. IMPROVED: Increase LO resolution to 1 Hz. IMPROVED: GUI layout fixes for Mac OS X. IMPROVED: Shortcuts for resetting and re-centering FFT plot after zooming. IMPROVED: Crash recovery in case of bad config file. IMPROVED: Support 50 fps FFT rate and allow disabling FFT. IMPROVED: I/Q DC canceling. 2.1.148: Released December 9, 2012 NEW: Support for USRP and RTL2832U (rtlsdr) devices. NEW: Pan & zoom on the pandapter axes. NEW: Allow changing FFT size. FIXED: Mac OS X compatibility. IMPROVED: Various improvements to the user interface. 2.0.0: Released July 7, 2012 First stable release of C++ version with Funcube Dongle support. 1.x: Initial experiments using Python and gr-qtgui.