A duophonic percussion/drum module that offers you two individual, almost identical voices. Each has an oscillator with selectable waveforms as well as an attack-decay envelope that can simultaneously modulate the pitch and the VCA.

A large number of sockets are available, which are not only used for modulating and triggering the drums but also output any oscillator waveform and envelopes. That is extremely useful!

The first difference between the two voices is the available waveforms: voice A offers square, triangle, and sine, while voice B has noise, square, and sine. For atonal noisy sounds like hi-hats and any cymbals, voice B is more suitable.
The waveforms are switch-selectable and simultaneously available at individual outputs, meaning you can process the audio signals externally. Using the module's EG CV outputs plus two external VCAs, you can recreate or alter the signal flow. Envelope signals and audio sources are available!

For controlling the frequency, there is a hi/lo switch alternating between bass and treble, then a tune control and a modulation attenuator which scales either the envelope or an external CV. Besides individual inputs (A VCO and B VCO), there is also a common CV input VCO A+B which addresses both voices simultaneously. A VCO is normalized to the VC CV input A VCA, similarly for channel B.

The second difference is in the envelopes. Voice A has an attack-decay envelope generator with manually adjustable times. Voice B has a decay envelope with fixed attack time but with voltage control of decay time via EG 2 input and the CV EG2 attenuator.
The envelope generators can modulate not only the pitch but also the level simultaneously. For that reason, there is a second attenuator which alternately determines the intensity of an external CV (see above).

Each voice has an individual audio output, although OUT B works as a mix output when no cable is plugged into OUT A.

*Essentially two things have changed in the + version:
-The output levels of the MIX outputs have been increased
-The frequency of the filter for noise can now also be controlled via CV