The Hex Envelope Follower module is capable of creating control voltages from six audio sources, trigger pulses, gate signals and also from other control voltages.
 
It can generate trigger and gate pulses when the incoming signal goes above a certain threshold.  You can adjust the attack and decay response times to generate swells or sustained envelopes.
 
Extract the envelope of an audio signal or change the time characteristics of other control voltages with the SynQuaNon Hex Envelope Follower. 
 
Expandable to 7 channels.
 
Ideal for guitar multi-channel, single-string, or hexaphonic effects processing.
 
Hand-built in the USA.