Sub page: MonoVoks4
design started March 2021, finished in Dec 2021

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Description: Monophonic synthesizer with dual oscillator, analog VCF up to oscillation (PoliVoks style) and vactrol-VCA. Oscillators have independant modulation (velocity controlled). Envelope generators with looping mode and random stepping mode. MIDI modulation wheel controls delayed vibrato/filtermodulation. Manual control with 8 potmeters + 3 switches(no menus). Full MIDI control for playing notes, remote control and patch storage/recall. Minimised hardware to later also serve as a voiceboard for a polyphonic synth. MonoVoks4 synthesizer basic functional block diagram MonoVoks4 synthesizer detailed potmeter control functions Documentation on circuit design, PCB data and software can be found below.	Introduction movie, demo sounds (YouTube link) Soundexample "music" MonoVoks4 breadboardversion playing the Bass: BassSub Osc changing Q PortamentoBass Glide Soundexamples: direct sound, no effects: SuperSaw Saw + SawSuboctave, dual wavemodulation Squaremod LFO square wave modulating resonant filter click-mode selecting clickmode, resonant filter LeadSynth Saw with Key glide and vibrato overdrive gitar new xmod (shapepotm fully right) beating sineharmonics one note drone, using shape potm Wobble Double saw, LFO on filter, Q increased slow drive filtersweep slow sweep on resonant filter KW-pattern Noise pattern on high Q filter, ENV-loop SineFM Two SineOsc FM with shapemodulation noise-to-pattern Noise steps changing into pattern Using random step mode of envelope generator: saw-filter-rand saw wave, random step filterfrequency filter-osc-rand Filter in oscillation making sine saw-filter-pat Pattern from key-looped random Using a MIDI sequencer: sequenced bass sending notes and controller data Instruction movies movie: startup movie: oscillator wave modulation, dual pulsewidth movie: filter modes movie: oscillator in noise/pattern mode movie: fun sequence by turning a knob
Backside of box (wooden box from hobby store):	Inside of the unit, front panel flipped up
Back of frontpanel(not wired yet) potmeters, switches, LEDs, mounting bolds for PCB PCB first proto assembled (jack connectors not mounted on boxed PCB) Top/bottom:	Frontpanel, wood, laser cut and engraved: Frontpanel showing related MIDI-controller numbers:
MonoVoks4 synthesizer basic functional block diagram MonoVoks4 synthesizer detailed functional block diagram MonoVoks4 synthesizer detailed potmeter control functions MonoVoks4 synthesizer detailed MIDI controller functions MonoVoks4 circuit diagram MonoVoks4 analog filter explained Oscillator basics How to generate synth waves without aliassing MonoVoks4 PCB components and connection info MonoVoks4 PCB components placing info MonoVoks4 PCB gerber files link to PCB files on OSHPARK (PCB manufacturer) MonoVoks4 laser files for wooden panels MonoVoks4 wooden panel signal flow picture Vactrol datasheet Analog filter opamp datasheet MonoVoks4 software, Arduino code, version 2m MonoVoks4 software, Arduino code, version 2p Page "Synthesizer circuits explained" for more info on hardware and software	Alternative build example: Mark Vervaart (France): Backside of unit.......... Separate elements Alternative build example: Marcio Miguel: Inside of unit