JMT Synth VDR-1b Percussion Synthesizer

This is a synth drum with a self-oscillating VCF.

It is equipped with a wideband oscillator and has a strong SWEEP effect.

You can create various tones by tapping on the body or with an external trigger (sequencer or piezo).

The oscillator has a thicker sound from highs to lows, and the waveform can be selected as TRIANGLE or SAWTOOTH.

SWEEP is set to be applied very strongly, so adjust it in conjunction with CUT OFF COARSE.

SUSUTAIN Setting of the decay time from the onset of sound

SENSITIVITY TRIGGER (When the plug is inserted into the trigger, the internal trigger of the unit is turned off) is to adjust the input sensitivity of the SENSITIVITY TRIGGER.

LFO.F controls the amount of LFO applied to the filter and LFO.

LFO.O controls the amount of LFO applied to the oscillator.

FINE is a finer pitch control for the oscillator than COARSE.

The RESONANCE oscillates at maximum and the pitch can be changed with the CUT OFF knob.
　
It can be powered by either a center minus 9V DC or 9V battery.

SYNTH DRUM

self-oscillate VCF with CUT OFF and RESONANCE

VCO triangle - sawtooth waveform

LFO.F LFO level for VCF

LFO.O LFO level for VCO

CV IN.F cvin for VCF

CV IN.O cvin for VCO

SENS. sensitivity for trigger to synth-drum

SWEEP

SUSTAIN

FORM waveform of LFO

RATE rate of LFO

NOISE level to VCO

Runs on DC9V negative center or a 9V battery.

https://www.jmtsynth.com/%E8%A4%87%E8%A3%BD-vdr-1