Analogue voltage controlled bidirectional slew limiter and function generator. Can be used as a slew limiter, envelope generator, envelope follower, VC(LF)O, and more. Features separate rise/fall slope control and bending with CV, gate/trigger inputs, loop mode for oscillation, and impedance-compensated outputs.397
Capabilities 5
Envelope Followerenvelope-follower
Fast rise rate tracks signal envelope; fall rate sets decay. Outputs envelope for CV modulation of other modules.397
Envelope Generatorenvelope-generator
Creates AR envelopes via gate input and AD envelopes via trigger input or push button. Output swings 0 to +10 V regardless of gate amplitude.397
Bidirectional slew limiter with separate rise and fall rates, slope bending, and CV modulation for both rate and shape.397
Voltage-Controlled Oscillatorvco
In loop/audio-range mode, operates as a temperature-stable VC(LF)O with variable waveshape and 1 V/oct tracking over several octaves.397
Jacks 12 — 8 in / 4 out
Name
Signal
Voltage
Description
Inputs (8)
Analogue In
mixed
—
Input for the signal to be slew limited. In gate/trigger/loop modes, sets the minimum (floor) voltage for each cycle; default is 0 V.397
Fall Bend CV In
cv
-5V to 5V
CV input to modulate the falling slope bend (shape). Receives normalled signal from Rise Bend CV In when unpatched. With bend knob centred, CV range is −5 V to +5 V.397
Fall CV In
cv
—
CV input to modulate the falling slew rate. Higher voltage increases slew rate (decreases slew time). Receives normalled signal from Rise CV In when Fall CV In is unpatched.397
Gate In
gate
—
In slew mode: high gate switches source to precision +10 V reference for AR envelopes. In loop mode: gates oscillation on/off. Logic thresholds: +2 V low, +3 V high (Schmitt).397
CV input to modulate the rising slope bend (shape). Normalised to Fall Bend CV In. With bend knob centred, CV range is −5 V to +5 V.397
Rise CV In
cv
—
CV input to modulate the rising slew rate. Higher voltage increases slew rate (decreases slew time). Normalised to Fall CV In for simultaneous modulation; responds at 1 V/oct when both are patched together.397
Trigger In
trigger
—
Rising edge resets output to 0 V and triggers a single-shot AD envelope. Logic thresholds: +2 V low, +3 V high (Schmitt).397
Outputs (4)
Fall Gate Out
gate
0V to 5V
Goes high (+5 V) whenever the slew core is falling; low (0 V) at all other times.397
Main slew-limited output. Highly accurate and impedance-compensated for pitch-accurate CV. Voltage range 0 to +10 V.397
Rise Gate Out
gate
0V to 5V
Goes high (+5 V) whenever the slew core is rising; low (0 V) at all other times.397
Parameters 8
Name
Type
Range
Behavior
Fall Bend
knob
—
Bends the falling slope from concave through linear to convex. Changing bend minimally affects slope time in loop mode due to compensation design. Center position is linear.397
Fall Slew Rate
fader
0.0005s – 30s
Sets the falling slew rate. Fast at bottom, slow at top. In full mode, slew time ranges from 500 µs to 30 seconds; in audio mode, 500 µs to 30 ms. LED on lever shows falling status and brightness correlates with positive output voltage.397
Frequency Range Switch
switch
—
Selects between full range (500 µs to 30 s; for use as slew limiter, VCLFO, envelope generator, envelope follower) and audio range (500 µs to 30 ms; for use as VCO, VCF, waveshaper).397
Rise Bend
knob
—
Bends the rising slope from concave through linear to convex. Changing bend minimally affects slope time in loop mode due to compensation design. Center position is linear.397
Rise Slew Rate
fader
0.0005s – 30s
Sets the rising slew rate. Fast at bottom, slow at top. In full mode, slew time ranges from 500 µs to 30 seconds; in audio mode, 500 µs to 30 ms. LED on lever shows rising status and brightness correlates with positive output voltage.397
Slew/Loop Switch
switch
—
Left position: standard slew limiter or envelope generator mode. Right position: loop mode — circuit continually re-triggers for sustained oscillation. In loop mode, output voltage rises to +10 V then falls to the analogue input voltage, repeating continuously.397
Trigger Button
button
—
Resets the output voltage to 0 V and starts a single-shot AD envelope: voltage rises to +10 V then falls to the voltage at the analogue input. Can also reset the output voltage without triggering a full envelope when used as a reset.397
V/Oct Trimmer
knob
—
Calibrates the module's 1V/oct pitch tracking. Accessible from front panel without removing the module. Each module is individually calibrated during production.397