Drum machines

Notes: Inspired by vintage drum synths, the unique Seven Sisters creates everything from classic percussion tones through to experimental synth effects. Play via buttons or trigger inputs compatible with widely available sequencers.

Supplier's Notes:
Seven Sisters is a percussion synthesizer with seven voices that aims to capture the essence of late '70s instruments like the Syncussion and Syndrum.

Each voice is equipped with multiple oscillators, noise generators, and filters, providing rich, complex tones beyond the capabilities of the original devices. This allows you to recreate classic sounds or craft more realistic snare, hi-hat, and cymbal effects. The result is a powerful percussion synthesizer that blends the essence of early drum synthesis with modern flexibility.

You can trigger Seven Sisters using the buttons at the bottom of the unit or trigger inputs at the top. It's the perfect companion for your Beatstep Pro, Korg SQ-64, Eurorack, or other trigger sequencers, whether in the studio or on stage.

Notes: The JMT VDR-1 is a synthesis-based percussion box made for pulsing noise that morphs from jarring bursts to highly tuned drum sounds. The VDR-1 gives the user a flexible drum voice in a small package with CV control of both the filter and the oscillator. Coupled with a capable LFO the VDR-1 is a great drum voice solution, with a no-frills aesthetic perfect for any synthesist from Monolake to Merzbow.

VDR-1 Features

VCO can morph between triangle and swatooth waveform
LFO for modulation of the VCO and VCF
Internal MIC for triggering of VCF and VCO
CV in for modulation of both VCO and VCF

This is a synth drum with a built-in 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.