peaks

Mutable Instruments Peaks

Dual trigger converter: envelopes, LFOs, and drums

8 HP Eurorack module

Peaks is a dual-channel trigger-to-signal converter that packs four distinct functions into 8HP: ADSR envelope generator, LFO, tap-tempo LFO, and drum synthesizer. It can run both channels independently or in linked modes, making it a flexible gap-filler for any Eurorack system. Its drum synthesis models classic 808 kick, snare, and hi-hat sounds, giving it genuine percussive character beyond utility use.

Features

  • Dual independent channels each selectable between ADSR envelope, LFO, tap-tempo LFO, and drum synth
  • ADSR with quartic attack and exponential decay/release, 0.2ms to 8s segments
  • LFO from 0.03 Hz to 160 Hz with five waveforms and per-waveform morphing/variation
  • Tap-tempo LFO that can lock to irregular rhythms
  • 808 kick model on channel 1 with tune and punch parameters
  • 808 snare model on channel 2 with tune and decay parameters
  • 808 hi-hat accessible via specific snare parameter combination on channel 2
  • Three control modes: Twin (shared parameters), Split (2 params per channel), Expert (fully independent)
  • 16-bit CV/audio generation at 48kHz sample rate
  • 0 to +8V output for envelopes, 10Vpp for LFOs and drum signals
  • Trigger inputs with 100k impedance and 0.6V threshold
  • Phase at reset control for LFO modes

Controls & Jacks (17)

  • Knob 1— Channel 1 first parameter (mode-dependent: Attack in ADSR, Rate in LFO, Tune in Drum)
  • Knob 3— Channel 1 second parameter (mode-dependent: Decay in ADSR, Waveform in LFO, Punch in Drum)
  • Manual TRIG 2— Selects control mode: Twin (shared parameters), Split (simplified), or Expert (independent)
  • Knob 2— Channel 2 first parameter (mode-dependent: Sustain in ADSR, Phase in LFO, Tune in Drum)
  • TRIG 2 Input— Trigger input for Channel 1 envelope or drum voice
  • Manual TRIG 1— Selects operating mode for Channel 1 (ADSR, LFO, or Drum synth)
  • OUT 2— Trigger input for Channel 2 envelope or drum voice
  • TRIG 1 Input— Audio/envelope output for Channel 1
  • Knob 4— Channel 2 second parameter (mode-dependent: Release in ADSR, Waveform in LFO, Decay in Drum)
  • Function— Tap to set LFO tempo or to synchronize LFO to external rhythm
  • OUT 1— Audio/envelope output for Channel 2
  • Split— Selects operating mode for Channel 2 (ADSR, LFO, or Drum synth)
  • Drum LED— Indicates Channel 1 activity/envelope progression
  • Split LED— Indicates Channel 1 operating mode
  • Envelope LED— Indicates Channel 2 operating mode
  • LFO LED— Indicates current control mode setting
  • Tap LFO LED— Indicates current control mode setting

How-To Guides

  • Classic ADSR Envelope
  • Twin Mode Dual Envelopes
  • 808 Kick and Snare Duo
  • 808 Hi-Hat from Snare Model
  • Trigger-Reset LFO Vibrato
  • Tap-Tempo Rhythmic Filter Sweep
  • Dual Independent LFOs
  • Stepped Random Melody Generator
  • Envelope Plus LFO in Split Mode
  • Kick-Triggered Envelope for Bass Layer

Explore the interactive Peaks panel on BleepDex — tap any control to learn what it does.

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