Envelope Generator Module
http://www.synthrotek.com/products/modular-circuits/adsr/
If you had an Unicorn Account you could see a chart with the price development of this module and the average price asked for this module.
Synthrotek ADSR eurorack module in 4hp. Functions well. Has some rack rash around the mounting holes; see pictures.
This offer was fetched from reverb.com. You cannot contact the seller via ModularGrid. You have to visit their site.
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