4-channel CV-controllable function generator with AD, AHR, cycling, burst, and morphing bipolar LFO modes; channels can be chained and have a 4-input CV matrix with attenuversion.393
Capabilities 4
Burst Generatorburst-generator
Any of the four channels can generate a rising or falling burst of pulses with control over burst length (FALL), pulse rate (RISE), pulse shape and amplitude envelope (SHAPE), and overall amplitude direction.393
Cv Matrixcv-matrix
Four freely-assignable CV inputs, each can be routed to any combination of Rise/Fall/Shape/Level destinations across all four channels, with 8 levels of attenuversion per assignment.393
Envelope Generatorenvelope-generator
Four independent AD, AHR, and CYCLE envelope generators with continuously variable response curves (log to linear to exp), stage times from 0.05ms to 20s, and user-selectable 5V or 10V maximum output.393
LFOlfo
Four channels can operate as bipolar LFOs (±5V) with morphable waveshapes, free-running or beat-synchronized via TRIG input. Alternate LFV mode provides chaotic non-repetitive modulation.393
Jacks 3 — 2 in / 1 out
Name
Signal
Voltage
Description
Inputs (2)
CV
cv
-10V to 10V
Four freely-assignable CV inputs that track 1V/oct; can modulate any combination of Rise, Fall, Shape, and Level across all four channels with per-assignment attenuversion. Accepts ±10V but clips modulation at ±5V.393
TRIG
gate
—
Trigger or gate input for each channel; launches the function generator. In LFO mode functions as a clock input for beat-synchronized LFOs. Jack detection allows free-running LFOs when unpatched.393
Outputs (1)
OUT
cv
0V to 10V
Output for each channel. AD/AHR/CYCLE/BURST modes output unipolar 0–5V or 0–10V (user selectable). LFO mode outputs ±5V bipolar.393
Parameters 5
Name
Type
Range
Behavior
FALL
knob
0.05ms – 20000ms
In AD/AHR/CYCLE modes: sets fall/release time (~0.05ms CCW to ~20s CW). In BURST mode: sets overall burst length (~0.3ms to ~20s). In LFO STANDARD mode: MORPH knob creating waveshape variations. In LFO ALTERNATE mode: VARIANCE knob setting per-cycle voltage variance.393
LINK/CV
button
—
Primary function: press repeatedly to cycle through channel link options (No Link, Trigger Link, End of Rise Link, End of Fall Link). Long-press to enter CV Assignment mode for that channel.393
MODE/DESTINATION
button
—
Press repeatedly to cycle through AD, AHR, CYCLE, BURST, LFO modes. Long-press (>1 sec) to toggle between STANDARD and ALTERNATE operation. In CV Assignment mode, sets modulation destination and attenuversion amount.393
RISE
knob
0.05ms – 20000ms
In AD/AHR/CYCLE modes: controls rise (attack) time from ~0.05ms (fully CCW) to ~50ms at noon to ~20s fully CW. In BURST mode: sets pulse rate within burst (0.05Hz to ~3.33kHz). In LFO mode: sets LFO rate (0.05Hz to ~3.33kHz free-running) or clock division/multiplication (1/64x to 64x when clocked).393
SHAPE
knob
—
In AD/AHR/CYCLE modes: sets response curve from logarithmic (CCW) through linear (noon) to exponential (CW). In BURST mode: shapes burst envelope and pulse waveform (square/sine in standard; saw/triangle/ramp in alternate). In LFO mode: selects from five basic waveshapes. In LFO alternate mode: slews directional changes.393
Firmware history 9 versions
Version
Released
Notes
1.4
2023-04
Added CVD Mode (alternative button coloring for color vision deficiency). In Utility Mode, sync LEDs now flash with a trigger.393
1.3
2021-09
Added Utility Mode for manually triggering channels and setting per-channel output voltages (5V or 10V, adjustable in 20% steps). Fixed Phase/Clock Sync abnormalities in LFV Mode. Moved 10V/5V setting from System Mode to per-channel Utility Mode.393
1.2.1
2021-03-09
Reduced pot dead zone. Fixed slightly longer minimum attack/decay times. Fixed LFOs not clock syncing in some cases. Fixed channel link to be a gate (not trigger) enabling AHR-to-AHR linking with hold time respecting gate length.393
1.2.0
2020-11-19
LFOs now phase-locked to TRIG input; linked LFOs phase-lock to first LFO's TRIG; linked LFOs can be reset via any chained TRIG input. Snappier envelopes down to virtually zero. Removed crossfade at burst mode extremes. Added 5% pot dead zone. Various fixes including LFO lockup, cycle mode stuck at minimum, and trigger detection improvements.393
1.1.3
2020-03-03
Fixed settings not carrying over correctly when upgrading from firmware 1.0.2 or earlier.393
1.1.2
2020-02-25
Added long-press of LEVEL button in System Mode to reset module to default settings. Fixed edge case where CV assignments were not being applied.393
1.1
2020-02-06
Expanded and redesigned Burst Mode (RISE=pulse rate, FALL=burst length, SHAPE morphs envelope and pulse waveform square/sine or saw/triangle/ramp in alternate). Added STANDARD/ALTERNATE modes for all 5 channel modes. Added System Mode for global settings. More extreme log/expo curves. Fixed distorted curves.393
1.0.2
2019-12-19
Fixed dithering algorithm to remove 'quantize error noise' on certain low frequency signals. Hold SHAPE on boot to toggle dithering.393