Name: BitPhase
draft: false
summary: Resonant 4-stage phaser with wide modulation sweeps, tremolo blending,
  and Burst-mode degradation
short-description: Resonant 4-stage phaser for the Workshop Computer with deep
  notch filtering, wide modulation sweeps, controllable resonance, tremolo
  blending, and digital Burst-mode degradation.
Language: C++ (Pico SDK + ComputerCard)
Creator: Adrian Vos
Version: 0.1.0
Status: Beta
License: MIT
date-created: 2026-06-24
date-updated: 2026-07-09
demo-link: https://www.youtube.com/watch?v=FQv6VNLOOzs
panel:
  inputs:
    - id: AudioIn1
      name: Main Audio Input
      description: Main audio input for the phaser engine
      type: audio
    - id: AudioIn2
      name: Secondary Audio Input
      description: Secondary audio input if used by firmware or patch
      type: audio
    - id: CVIn1
      name: Rate CV
      description: Modulates phaser and tremolo speed
      type: cv
    - id: CVIn2
      name: Resonance CV
      description: Modulates phaser feedback amount
      type: cv
    - id: PulseIn1
      name: LFO Reset
      description: Resets phaser LFO so sweep can be clock-synchronised
      type: pulse
  outputs:
    - id: AudioOut1
      name: Processed Output A
      description: Dual mono output of processed signal
      type: audio
    - id: AudioOut2
      name: Processed Output B
      description: Dual mono output of processed signal
      type: audio
    - id: CVOut1
      name: Phaser LFO CV
      description: Phaser LFO waveform output
      type: cv
    - id: CVOut2
      name: Tremolo LFO CV
      description: Tremolo LFO waveform output
      type: cv
    - id: PulseOut1
      name: Burst Active
      description: High while Burst mode is active
      type: pulse
    - id: PulseOut2
      name: Phaser LFO Phase
      description: Phaser LFO phase indicator for synchronising external events
      type: pulse
tags:
  - effect
  - phaser
  - tremolo
  - lo-fi
controls:
  switch:
    up:
      name: Phaser
      description: Pure resonant 4-stage all-pass phaser with the cleanest signal path.
    middle:
      name: Phaser + Tremolo
      description: Blends phasing with tremolo for animated pulsing movement.
    down:
      name: Degrade
      description: Adds sample-and-hold reduction, bit-depth reduction, and unstable
        lo-fi texture.
  knobs:
    - main:
        name: Rate
        description: Speed of the internal phaser and tremolo LFOs
      x:
        name: Sweep Depth
        description: Phaser modulation depth from narrow movement to wide sweeping notches
      y:
        name: Resonance
        description: Phaser feedback amount from smooth phasing to edge-of-self-oscillation
  leds:
    - display: list
      items:
        - id: LED0
          name: LED 1
          description: LED 1 follows the rate position.
        - id: LED1
          name: LED 2
          description: LED 2 follows the phaser LFO position.
        - id: LED2
          name: LED 3
          description: LED 3 follows sweep position.
        - id: LED3
          name: LED 4
          description: LED 4 follows Burst intensity.
        - id: LED4
          name: LED 5
          description: LED 5 indicates Burst mode status.
        - id: LED5
          name: LED 6
          description: LED 6 monitors Pulse In 1.
host:
  notes: >
    BitPhase combines a resonant 4-stage all-pass phaser, independent phaser and
    tremolo LFOs, CV control of rate and resonance, and a Burst-mode digital
    degradation path.

    Main controls LFO rate, X controls phaser sweep depth, and Y controls
    resonance/ feedback. Switch up is pure phaser, middle blends phaser with
    tremolo, and down enables Burst degradation. Pulse In 1 resets the phaser
    LFO for clock-synchronised sweeps.
contact:
  social:
    github: https://github.com/soveda