Analog drum voice — a 1:1 recreation of one channel of the Pearl Syncussion SY-1. Two oscillators feed a voltage-controlled filter and a decay envelope, with six switchable oscillator modes (A–F) spanning tonal toms, metallic FM, vibraphone-like mixes, velocity sweeps, and noise. CV inputs for pitch, decay, filter cutoff, and oscillator-mode selection make one module cover several drum voices.937
Internal LFO with selectable square or triangle waveshape adds vibrato pitch modulation; depth controlled by LFO FADER, rate by LFO SPEED.937
Vcfvcf
Filter cutoff range is set by the WIDTH slider and can be swept via FILTER CV input (±10V offset).937
Jacks 6 (5 in / 1 out)
Name
Signal
Voltage
Description
Inputs (5)
DECAY CV
cv
-10V to 10V
CV input for decay time; offsets the DECAY slider over a ±10V range.937
FILTER CV
cv
-10V to 10V
CV input for filter cutoff frequency that offsets the WIDTH slider; range ±10V.937
MODE CV/Gate
mixed
0V to 5V
Dual-function oscillator mode input: in CV mode, selects the oscillator mode via 0–5V; in gate advance mode, each received gate/trigger steps the mode in the direction of the last manual button press.937
PITCH CV
cv
-10V to 10V
1V/oct pitch CV input that offsets the TUNE slider position; range is ±10V.937
Trigger IN
trigger
—
Dynamic trigger input that fires the VCA; sensitivity is trimmer-adjustable on the back panel. Accepts standard drum triggers.937
Outputs (1)
OUTPUT
audio
—
Main audio output at standard Eurorack signal levels.937
Selects whether the sweep pitch movement goes up or down.937
LFO FADER
fader
≥0
Sets the depth of LFO pitch modulation; setting to 0 disables LFO modulation entirely.937
LFO SHAPE
switch
—
Selects between square wave (abrupt pitch changes) and triangle wave (smooth continuous pitch movement) for the LFO.937
LFO SPEED
fader
—
Sets the rate of the LFO for adding vibrato to the selected sound.937
OSC Mode Buttons
button
—
Manually increments or decrements the oscillator mode (A–F); the direction of the last manual change determines the sweep direction when Gate Advance mode is active on the MODE CV input.937
S/H
switch
—
Enables sample-and-hold pitch randomization on each hit; rate is governed by the LFO SPEED control and operates independently of LFO modulation on/off status.937
SPEED
fader
—
Controls how quickly the pitch transitions from the initial struck pitch to the final pitch set by the SWEEP DEPTH control.937
WIDTH
fader
—
Sets the filter cutoff frequency range; a wider range causes the frequency to sweep from high down to low.937