draft: false
Name: Motorik
short-description: Motorik drum machine — kick/snare/hihat with bass and melody CV, classic Krautrock grooves
Language: C++ (Pico SDK + ComputerCard)
Creator: Joep Vermaat
contact:
  email: joep@joep-i.nl
  website: https://codeberg.org/johantv/
Version: 1.0
Status: Released
License: MIT
date-created: 2026-05-17
date-updated: 2026-05-17
Repository: https://codeberg.org/johantv/motorik

tags:
  - motorik
  - krautrock
  - rhythm
  - drums
  - simple
  - drive
  - endless

summary: |
  Generative motorik drum machine with synchronized two-voice bass CV/gate outputs.
  Z middle is main drum-performance mode (energy/transpose/fill), Z down is tilt and
  bass pattern shift, Z up is texture/decimation and variation/humanize. Pulse In 1
  clocks the engine externally; otherwise a fixed internal 120 BPM engine runs. Pulse
  In 2 triggers one-bar fills. AudioOut1/2 carry drum mix, while CV/Pulse outputs carry
  root and mirrored (+12) bassline voices.

panel:
  inputs:
    - id: PulseIn1
      name: External Clock
      description: Rising-edge external clock source; falls back to internal 120 BPM when absent
    - id: PulseIn2
      name: Fill Trigger
      description: Rising edge triggers one-bar fill
    - id: AudioIn1
      name: Energy Override Input
      description: Envelope-followed override source for drum energy zoning
    - id: AudioIn2
      name: Texture Override Input
      description: Envelope-followed override source for texture filter depth
    - id: CVIn1
      name: Bass Root Transpose CV
      description: Adds semitone transpose to bass root
    - id: CVIn2
      name: Bass Pattern Shift CV
      description: Modulates bass timing shift amount
  outputs:
    - id: AudioOut1
      name: Drum Mix Output A
      description: Main drum mix output
    - id: AudioOut2
      name: Drum Mix Output B
      description: Duplicate drum mix output
    - id: PulseOut1
      name: Bass Root Gate
      description: Gate for root bassline voice
    - id: PulseOut2
      name: Bass Mirror Gate
      description: Gate for mirrored (+12) bassline voice
    - id: CVOut1
      name: Bass Root Pitch CV
      description: Root bassline pitch CV
    - id: CVOut2
      name: Bass Mirror Pitch CV
      description: Mirrored (+12) bassline pitch CV

controls:
  knobs:
    - when: { z: middle }
      main:
        name: Pattern Energy
        description: Progressive drum layer density from kick-only to full pattern and double-time hihat
      x:
        name: Bass Root Transpose
        description: Semitone transpose offset for bass root/mirror pitch generation
      y:
        name: Fill Probability
        description: Probability of automatic one-bar fills
    - when: { z: down }
      main:
        name: Spectral Tilt
        description: Crossfade between kick-heavy and hihat-heavy balance while keeping snare level stable
      x:
        name: Bass Root Pattern Shift
        description: Time-shift amount for bar 1 bass pattern
      y:
        name: Bass Mirror Pattern Shift
        description: Time-shift amount for bar 2 mirrored bass pattern
    - when: { z: up }
      main:
        name: Texture / Decimation
        description: Filter wash depth when AudioIn2 is unpatched, or sample-rate decimation when AudioIn2 is patched
      x:
        name: Pattern Variation
        description: Ephemeral per-bar mutation amount of drum bitmasks
      y:
        name: Humanize Range
        description: Per-trigger micro-delay randomization depth

  leds:
    - display: list
      items:
        - id: LED0
          name: Beat Position 1
          description: Quarter-note beat position indicator segment
        - id: LED1
          name: Beat Position 2
          description: Quarter-note beat position indicator segment
        - id: LED2
          name: Beat Position 3
          description: Quarter-note beat position indicator segment
        - id: LED3
          name: Beat Position 4
          description: Quarter-note beat position indicator segment
        - id: LED4
          name: Bass Activity
          description: Lit when bass note gate is active
        - id: LED5
          name: Fill Active
          description: Lit while fill logic is active