Eurorack Reference / modules /grp/envelope-follower audit site v0.1 — milestone 3
grp/envelope-follower

P12 Envelope Follower

GRP Synthesizer

CV and gate extraction from audio signal with Line/Mic selectable level. Includes a pre-amped audio signal output.625

Capabilities 1

Envelope Followerenvelope-follower
Extracts a CV envelope and gate signal from an audio input. Supports Line/Mic level selection and provides a pre-amped audio thru output.625

Jacks 4 — 1 in / 3 out

NameSignalVoltageDescription
Inputs (1)
INPUTaudio625
Outputs (3)
ENV OUTcvCV envelope follower output, with level controlled by the ENV OUT attenuverter.625
GATE OUTgateGate output that goes high when the audio level crosses the threshold set by THRESH.625
PRE OUTaudioAudio signal output after INPUT level control (pre-amplified).625

Parameters 4

NameTypeRangeBehavior
ENV OUTknobAttenuverter controlling the bipolar gain of the CV signal at the ENV OUT port.625
INPUTknobSets the input level for the signal connected at the INPUT port.625
LINE/MICswitchSelects between Line-level and Mic-level sensitivity for the audio input.625
THRESHknobSets the threshold level at which the gate signal is generated at GATE OUT.625

Firmware history 0 versions

No firmware history recorded.

References 2

  1. [625]
    GRP Synthesizer P12 Envelope Follower Datasheetmanual
    verified 2026-05-21
  2. [626]
    GRP Synthesizer P12 Envelope Follower product pageproduct_page
    verified 2026-05-21