draft: false
Name: Blueberry Smoothie
short-description: Conceptual Blueberry-inspired pentatonic CV and gate recorder for the Workshop Computer.
summary: >-
  The third card in the Workshop Buddies trilogy, Blueberry Smoothie is a
  hardware-tested monophonic CV and gate recorder conceptually inspired by
  [Blueberry](https://github.com/plinkysynth/buddies_public/tree/main/sw/src/blueberry),
  not a direct firmware port or an exact recreation of its hardware interface.
  Any compatible pitch CV into CV In 1 is snapped to the nearest note in
  Blueberry's fixed C, D, F, G, A pentatonic set, repeated across octaves;
  Pulse In 2 supplies an independent gate. The suggested 4 Voltages patch can
  span several octaves and is not required. Main transposes the quantised result.
  Down toggles recording, LED 2 shows an active take, and Up plays the saved
  phrase with recorded timing or one event per Pulse In 1 clock edge.
  Loops are held in RAM and clear on reset; the card produces pitch and gate,
  not audio.
Language: C++ (Pico SDK / ComputerCard 0.4.0)
Creator: Adrian Vos
Version: "0.3.0"
Status: Beta
License: MIT
date-created: 2026-09-24
date-updated: 2026-10-10
repository: https://github.com/soveda/workshop-buddies
contact:
  social:
    github: https://github.com/soveda
tags:
  - sequencer
  - quantiser
  - cv
  - performance
panel:
  inputs:
    - id: CVIn1
      name: Pitch CV
      type: cv
      description: Any compatible pitch CV, quantised at 1 V/oct to the nearest C, D, F, G or A across octaves before Main transposition. The suggested 4 Voltages source can span several octaves.
    - id: PulseIn2
      name: Gate In
      type: pulse
      description: Independent live and recorded gate from Slopes or an external gate/trigger source.
    - id: PulseIn1
      name: Clock
      type: pulse
      description: Advances one recorded event per rising edge during loop playback.
  outputs:
    - id: CVOut1
      name: Quantised Pitch
      type: cv
      description: Calibrated 1 V/oct pitch from the live quantiser or recorded loop, including Main transposition.
    - id: PulseOut1
      name: Gate
      type: pulse
      description: High for an active live or recorded note.
    - id: PulseOut2
      name: Loop Start
      type: pulse
      description: Short pulse at loop restart.
controls:
  switch:
    up:
      name: Play Loop
      description: Finishes an active recording and plays the captured phrase.
    middle:
      name: Free Play
      description: Plays live CV pitch and gate; recording continues here until stopped.
    down:
      name: Record Toggle
      description: One Down press starts a new take; release, then press again to stop. Holding does not retrigger.
  knobs:
    - main:
        name: Transpose Notches
        description: Cross 3 o'clock for one upward notch or 9 o'clock for one downward notch; return through centre to rearm. Alternating fifth/fourth steps transpose the quantised result, reaching an octave after two upward notches.
  leds:
    - display: list
      items:
        - id: LED0
          name: Input Calibration
          description: Reports input calibration data only, not CV output calibration. Off does not prevent use.
        - id: LED1
          name: Loop Playback
          description: Lit while a recorded loop is playing in Switch Up.
        - id: LED2
          name: Recording
          description: Stays lit while recording, including after the switch returns to Middle.
        - id: LED3
          name: Clock Patched
          description: Lit when Pulse In 1 is connected.
        - id: LED4
          name: Gate
          description: Lit while the live or recorded note gate is high.
        - id: LED5
          name: Pitch
          description: Brightness represents current quantised pitch.
uf2:
  - path: uf2/Blueberry-Smoothie-0.3.0.uf2
    name: Blueberry Smoothie 0.3.0