draft: true
Name: Bumpers
short-description: "'Bouncing ball' style delay and trigger generators"
Language: C++ (Pico SDK + ComputerCard)
Creator: Chris Johnson
Version: 1.0
Status: Released
date-created: 2025-04-28
date-updated: 2026-02-10

tags:
  - trigger
  - delay
  - generative
  - utility

summary: |
  Bouncing-ball trigger generator and multitap delay card.
  Trigger streams can be internally generated or externally clocked, with pulse outputs and related CV/audio outputs.
  Patching audio input enables the delay processor; otherwise outputs act as trigger/CV generators.

# certainty: low — panel and control details inferred from src/bumpers.cpp (README references a booklet not present in this folder)
panel:
  inputs:
    - id: PulseIn1
      name: Trigger Clock A
      description: Rising edge triggers/restarts channel A bounce sequence
      type: pulse
    - id: PulseIn2
      name: Trigger Clock B
      description: Rising edge triggers/restarts channel B bounce sequence
      type: pulse
    - id: AudioIn1
      name: Delay Audio Input
      description: Enables multitap delay path when connected
      type: audio
    - id: AudioIn2
      name: Delay Time Modulation
      description: Modulates delay interpolation length when connected with Audio In 1
      type: cv
    - id: CVIn1
      name: Timing Modulation A
      description: Modulates channel A pulse spacing in combination with knob X
      type: cv
    - id: CVIn2
      name: Timing Modulation B
      description: Modulates channel B pulse spacing in combination with knob Y
      type: cv
  outputs:
    - id: PulseOut1
      name: Bounce Pulse A
      description: Pulse output for channel A bounce events
      type: pulse
    - id: PulseOut2
      name: Bounce Pulse B
      description: Pulse output for channel B bounce events
      type: pulse
    - id: CVOut1
      name: Random Pitch CV
      description: Quantized/random pitch output associated with channel A events
      type: cv
    - id: CVOut2
      name: Ramp CV
      description: Interpolated CV ramp output associated with channel B events
      type: cv
    - id: AudioOut1
      name: Delay Output L
      description: Left delay mix output when audio delay mode is active
      type: audio
    - id: AudioOut2
      name: Delay Output R
      description: Right delay mix output when audio delay mode is active
      type: audio

controls:
  knobs:
    - when: { z: middle }
      main:
        name: Bounce Decay
        description: Scales spacing-growth/decay for both bounce channels
      x:
        name: Channel A Rate
        description: Sets channel A trigger rate base (with CV In 1 modulation)
      y:
        name: Channel B Rate
        description: Sets channel B trigger rate base (with CV In 2 modulation)
    - when: { z: down, gesture: momentary }
      main:
        name: Manual Trigger
        description: Switch edge in down position triggers both channels manually
  leds:
    - when: { z: middle }
      display: list
      items:
        - id: LED0
          name: Pulse A Activity
          description: Lit while Pulse Out 1 is active
        - id: LED1
          name: Pulse B Activity
          description: Lit while Pulse Out 2 is active