draft: true
Name: Glitter
short-description: Granular Looping Sampler
Language: C++ (Pico SDK + ComputerCard)
Creator: Steve Jones
Version: 0.1.2-beta
Status: Beta
License: MIT
date-created: 2025-04-04
date-updated: 2025-05-02
Repository: https://github.com/sdrjones/mtws/tree/main/53_glitter

tags:
  - granular
  - looper
  - stereo
  - glitch
  - sampler

demo-link: https://youtu.be/JW8Z_I-ub2A

summary: |
  Glitter continuously plays a 2-second stereo loop while up to six grains read random snippets from it.
  Switch up/down records into the loop (up for continuous record, down for punch-in style). Main blends
  plain loop vs granulated output, X controls repitch behavior in play and overdub balance in record, and
  Y sets maximum grain size. CV inputs influence grain repeat/sleep behavior and Pulse In 1 can quantize
  grain length/position against a clock.

panel:
  inputs:
    - id: AudioIn1
      name: Audio Input Left
      description: Left channel input for loop recording
    - id: AudioIn2
      name: Audio Input Right
      description: Right channel input for loop recording
    - id: CVIn1
      name: Grain Repeat Chance CV
      description: Higher at lower voltage, decreases with positive CV
    - id: CVIn2
      name: Grain Sleep Chance CV
      description: Higher at lower voltage, decreases with positive CV
    - id: PulseIn1
      name: Clock Input
      description: Steady clock quantizes grain size/position behavior
  outputs:
    - id: AudioOut1
      name: Audio Out Left
      description: Processed loop/granular output
    - id: AudioOut2
      name: Audio Out Right
      description: Processed loop/granular output

controls:
  knobs:
    - when: { z: any }
      main:
        name: Loop vs Grains Blend
        description: Clockwise favors plain loop, counter-clockwise favors granulated output
      y:
        name: Max Grain Size
        description: Longer grains clockwise, shorter grains counter-clockwise
    - when: { z: middle }
      x:
        name: Repitch Chance
        description: Controls octave/fifth variation probability for grains during playback
    - when: { z: up_or_down_record }
      x:
        name: Overdub Mix
        description: Balance old loop material vs newly recorded audio
  switches:
    - id: Z
      up:
        name: Continuous Record
        description: Hands-free ongoing recording while grains play previous loop material
      down:
        name: Punch Record
        description: Momentary overwrite recording for short captured snippets