Synthrotek is pleased to offer a complete line of eurorack synthesizer modules, power, cases and accessories in both complete units kits and panels & pcbs. We now offer a very complete analog modular monophonic voice with many accompanying utility modules. This new complete voice is the product of a collaboration with synth guru George Mattson, who now joins us in releasing our new MST (Mattson – Synthrotek) line of premium modules.



The MST Dual Envelope is a simple to use yet complex dual envelope generator.  Channels 1 and 2 are both normalled to each other to cycle when the other respective channel hits end of cycle, allowing for really interesting ping-pong effects.  Each channel also has an end-of-cycle trigger output with LED indicator.  There’s a normal and inverted envelope out.  The inverted envelope out can be further modified by the +5 offset switch, which allows the inverted waveform to travel in the positive.  The + output level allows the envelope signal to go between zero and the maximum voltage rail.  Attenuate the output level down for a more subtle envelope (adjust to taste).


Two self-completing envelope circuits

AD or ASR selector switch per channel

Manual Attack control & Decay/Release

Output level per channel

Gate input

End-of-cycle trigger output with LED indicator

Normal & Inverted envelope output per channel

Short and long envelope length switch per channel

Long setting can be lengthened with jumper select

AD/ASR selection switch per channel

Inverted output +5 offset switch per channel


Current draw: V+ max 10mA, V- max 8mA

Width: 12HP

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