Envelope Follower

The EMW Envelope Follower module is capable of creating control voltages from an audio source, trigger pulses, gate signals and also from other control voltages. It also generate its own trigger and gate pulses when the input reaches a certain level, that can be adjusted on
the front panel thru the threshold level control. You can set the response (attack/decay) time for fast or slow response. Extract the envelope of an audio signal or change the time characteristics of other control voltages with the EMW Envelope Follower.

http://www.electronicmusicworks.com/detalhes.asp?id=91&produto=94&loja=EURORACK

• 35 mA +12V
• 10 mA -12V
• ? mA 5V
• 50 mm Depth

No info about availability.