ADSR Envelope generator with voltage control inputs

The GMS710MU Voltage Controlled Envelope Generator combines the function of a wide range ADSR envelope generator with a voltage controlled amplifier to provide a complete envelope modulation element in one 1MU module. The attack, decay and release times are variable over a range of 1 millisecond to 10 seconds. A 0 - 5V CV applied to the corresponding input jack will vary the time value over the entire range of the manual control. A 0 - 5V CV applied to the sustain jack will vary the sustain voltage over the range of 0 to 100 percent.

The built in VCA has a linear control response and is normalized to the positive envelope output of the ADSR. A seperate amplifier input and output are provided to route external control or audio signals through the amplifier. A CV level control and an initial gain control affect the starting point and the amount of modulation the ADSR output will produce on the amplifier signal.


Technical Specifications

Envelope Generator Section

Attack, Decay, Release Range
1 millisecond to 10 seconds

Voltage Control Range
0-5V for 1 ms to 10 second range

Output Amplitude
0-5 Volts

Envelope Output
Both positive and negative envelope available simultaneously

VCA Section

Control function
Linear amplitude change with input CV

Gain factor
0.5 Volts per Volt

Typical Input Impedance
100K Ohms

Typical Output Impedance
1K Ohms (short circuit protection)

Module Power
+15 Volts 45 mA.
-15 Volts 45 mA.

Module Size
Panel height - 8.75 inches (222 mm)
Panel width - 4.25 inches (108 mm)
Depth (behind panel) 2.1 inches (53 mm)



We produce electronic synthesizer modules in the two most popular formats, MU (Moog compatible 5U) and EU (Eurorack compatible 3U). A wide range of voltage controlled modules including oscillators, amplifiers, mixers, envelope generators, special effects units, wave generators, filters, power systems and cases allow users complete freedom to configure any desired electronic music instrument.


Grove Audio builds microphones, preamplifiers, equalizers, compressors and other professional audio equipment for performance and studio use. We build units in popular formats such as 19 inch rack mount and 500 series 3U modules. We can also produce custom designs on request. Contact us for a consultation.


You can explore all of our products, download spec sheets, and purchase our products in the Grove Audio Synth Store. You can also learn about our periodic specials and new product introductions. Click the button below to go directly to the store.

Follow Us!

Grove Audio Help
  • Email:
  • Phone: 608 886-6503


Grove Audio has been manufacturing professional recording and modularized electronics for musicians and performers since 1995.