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ADSR – Synthrotek
Hungry Robot Modular LOOPING ADSR - The Sound Parcel
Hungry Robot Modular LOOPING ADSR
Have you seen/heard about the Poly Morph? This is a digitally controlled analog gain stage/overdrive, resonant LP/HP/BP filter, multi band compressor, ADSR envelope and tremolo. Here's an "early UI concept". More in
Heavy Pedal - ADSR Sounds
Precision ADSR, enhanced – Analog Output
Pigtronix Philosopher King Envelope Generator Sustainer Guitar Pedal