Sub page: MonoStat1
(design 2017)

description:

Monophonic synthesizer with analog signalpad (VCA,VCF) controlled and programmed via MIDI but the user interface is not chosen yet. All sounds are made using only 16 midi controllers (potmeters) no menus. It has an oscillator with PWM and a Suboscillator.Two syncable modulators can act as Envelope Generator or LFO. In the LFO mode they have the possibility to apply patterns to their waveforms creating dynamic modulation sequences as can be heard in the example sounds.
The VCF circuit (HP/LP/BP/BR) is an analog state variable filter with potmeters replaced by highspeed PWM controlled switches. This filter sounds very clean compared to the "Voks" filters. VCA is based on a "vactrol"
The PCB is not yet designed.
sound examples from the breadboard (no effects, no sequencing)

sound1
sound2
filtermode
switching filter LP-HP-BP-BR
breadboard containing the complete synth including MIDI in: