Doepfer A-140 ADSR Envelope Generator presonus the reference level can be

the reference level can be easily switched to match any of RME's current interface devices

Exceptional reproduction of low-frequency sounds

2 mA typical BATTERY TYPE 1

ultra-quiet passive design

Doepfer A-140 ADSR Envelope Generator presonus the reference level can beModule A 140 is an envelope generator, and, since it puts out control voltages, counts as one of the modulation devices in a modular system. As soon as the gate input receives sufficient voltage, the ADSR generates a variable voltage, changing in time, called an envelope. This varying voltage is output in normal (positive) and inverted form, and can be used, eg., for voltage controlled modulation of a VCO, VCF, or VCA, or for processing other modules'