Transistor Envelope Generator

This module contains a traditional ADSR envelope generators that use transistors to switch between phases. This type of ADSR was widely available in the 1970’s in analog modular and mono synth, and they are both positive and negative control voltage, with the maximum output level of 7.5V

TheAM8145 has rotary potentiometers controlling Attack, Decay, Sustain and Release, and the gating of the ADSR is controlled from an external gate signal, or from the front panel momentary push button with a red LED shows when the gate signal is on. It is NOT controlled by the Doepfer bus gate, the ADSR must be manually patched.