draft: false
contact: { email: "casconed@gmail.com" }
Name: Lockstep
short-description: Dual quantized pitch-mover — two CV outs walk together through a scale to drive two oscillators in parallel
Language: C++ (Pico SDK + ComputerCard)
Creator: Jason Moore
Version: 1.0
Status: Released
License: MIT
date-created: 2026-07-16

summary: |
  Two CV outputs wander together through a scale (parallel motion): you tune two
  oscillators by hand to set the interval and the card moves them in lockstep, clocked
  and quantized. X sets how often it moves (clock division when clocked, internal rate
  when free), Y sets how far (frozen single note up to +/- one octave). Switch DOWN
  (momentary) selects the scale via the Main knob; UP freezes the current pitches;
  MIDDLE runs. Main knob is a resonant low-pass filter processing the two oscillators
  returned through Audio In 1/2, out Audio Out 1/2. Pulse In 1 clocks it, Pulse In 2
  re-seeds. The walk is centered high and floored so the pitch CV never goes negative.

panel:
  inputs:
    - id: PulseIn1
      name: Clock
      description: Rising edge advances the walk (divided by X); internal clock when unpatched
    - id: PulseIn2
      name: Re-seed
      description: Rising edge jumps the walk to a fresh pattern
    - id: AudioIn1
      name: Oscillator A Return
      description: Oscillator A fed back in for filtering
    - id: AudioIn2
      name: Oscillator B Return
      description: Oscillator B fed back in for filtering
    - id: CVIn1
      name: Unused
      description: Not used in this version
    - id: CVIn2
      name: Unused
      description: Not used in this version
  outputs:
    - id: CVOut1
      name: Voice A Pitch
      description: Quantized V/Oct pitch CV for oscillator A
    - id: CVOut2
      name: Voice B Pitch
      description: Quantized V/Oct pitch CV for oscillator B (parallel, identical walk)
    - id: PulseOut1
      name: Voice A Gate
      description: 10 ms gate on each note change for voice A
    - id: PulseOut2
      name: Voice B Gate
      description: 10 ms gate on each note change for voice B
    - id: AudioOut1
      name: Voice A Filtered
      description: Oscillator A through the resonant low-pass
    - id: AudioOut2
      name: Voice B Filtered
      description: Oscillator B through the resonant low-pass

controls:
  knobs:
    - main:
        name: Filter Cutoff / Scale Select
        description: Resonant low-pass cutoff for the returned oscillators; selects the scale while switch is held DOWN
      x:
        name: Movement Rate
        description: Clock division when clocked, internal rate when free-running
      y:
        name: Movement Range
        description: How far the walk wanders, from a single held note to plus/minus one octave

  leds:
    - display: list
      items:
        - id: LED0
          name: Position / Scale bit 0
          description: Walk position bar in Run; scale-index bit while selecting
        - id: LED1
          name: Position / Scale bit 1
          description: Walk position bar in Run; scale-index bit while selecting
        - id: LED2
          name: Position / Scale bit 2
          description: Walk position bar in Run; scale-index bit while selecting
        - id: LED3
          name: Position / Scale bit 3
          description: Walk position bar in Run; scale-index bit while selecting
        - id: LED4
          name: Position / Scale bit 4
          description: Walk position bar in Run; scale-index bit while selecting
        - id: LED5
          name: Position / Scale bit 5
          description: Walk position bar in Run; scale-index bit while selecting