The DOEPFER Module A-190-4 is a Midi-to-CV/Gate/Sync interface, which is used to control A-100 modules via Midi or USB.

It has available two CV outputs, which put out control voltages from about -3V to +10 V (CV1) or  0V to +10V (CV2)  so that you can control not just the pitch, but also another voltage-controllable parameter on the A-100. CV1 is 'hard-wired to receive Midi note messages and convert them into a 1V/octave compatible control voltage available output socket CV1. As a rule, CV1 will be used to control the pitch of one or more VCOs which follow the 1V/octave standard (all A-100 VCOs follow this standard). In addition, the A-190-4 allows for portamento (glide) and pitch-bend, and provides a software LFO for CV1.

The second CV output CV2 can assigned to Midi velocity, after touch or your choice of MIDI controller. It can be used for voltage control of any suitable module (eg VCF, VCA, etc.). A-190-4 has a Gate output available which is usually connected to the gate input(s) of one or more envelope generators (ADSR).
The module also has a clock output available which is controlled by MIDI clock. This can be divided down to provide a variety of clock outputs, and enable older sequencers or drum machines to be synced to Midi.

The Reset output is controlled by Midi Start/Stop. A Midi Start or Continue message turns Reset to low, a Midi Stop messages makes it go high.
From the factory the voltage levels for Gate, Clock and Reset are +5V. By means of a jumper the levels can be changed to +12V. Within the A-100 both levels are possible. If you want to control other devices please refer to the user manual which level is required.

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