Over the last year I built this digitally controlled analog polyphonic synthesizer. All schematics and PCBs I created myself (except of the chorus).
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It was harder than I thought to finish this project but I learned how to layout PCBs and a lot about vintage synthesizers.
0:00 - Voice Stacking/Detuning
0:34 - Envelope Generator
1:55 - Filter
3:10 - Filter with Envelope Generator
5:38 - PWM
6:48 - Filter Resonance with LFO
7:26 - PWM with LFO
8:53 - Filter Cutoff with LFO
10:28 - Arpeggio
13:45 - Chorus
15:11 - Arpeggio
18:24 - Arpeggio
All schematics and PCB layouts can be found on https://github.com/polykit
GitHub: https://github.com/polykit
Mastodon: https://chaos.social/@polykit
Specs are:
- 6 voice polyphonic analog DCO based on Juno 106 using a single Raspberry Pi Pico
- Sawtooth and square signal
- PWM control (manual, LFO)
- Voice stacking and detuning
- MIDI input
- MIDI pitch bend
- MIDI portamento https://youtube.com/shorts/DGcm8E8b2Ko
- CEM3350/AS3350 state variable filter
- Lowpass and bandpass output
- Frequency cutoff/center control (manual, ADSR, LFO)
- Resonance control (manual, LFO)
- LFO
- 2x ADSR based on CEM3310/AS3310 (SVF, VCA)
- Juno 60 chorus clone
Attention! This is not for beginners in electronics nor a finished product.
#synthesizer
#polyphonic
#diy