Doepfer A-104 Quad Resonance Filter subdecay Opto-couplers for noise-free switching

Opto-couplers for noise-free switching

Audio-grade surface mount components

At DS and QS the added latency can simply be ignored

Ergonomic Design

The Echo Dream 2 is a lofi modulating delay pedal that can drive into fuzzed out insanity

Doepfer A-104 Quad Resonance Filter subdecay Opto-couplers for noise-free switchingA 104 is a fourfold formant filter as used in the Mixtur Trautonium by Oskar Sala. It is made of four parallel resonance filters, each filter can be switched to low pass or band pass or off. Frequency, resonance and level are controlled for each filter separately (no voltage control). The frequency range for the filters is about 50Hz 5kHz. The filter audio inputs are very sensitive so that distortion may intentionally be used to create new sounds if