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In this video I talk about the technical details of my DIY digitally controlled analog polyphonic synthesizer.

This is the first video of a series where I talk more in depth about the different components. All schematics and PCB layouts can be found on my GitHub site.

I’M BUILDING AN ANALOG POLYSYNTH - AGAIN PT1:    • I’m Building an Analog Polysynth - Ag...  
How I built a PATCHABLE ANALOG SYNTH from scratch:    • How I built a PATCHABLE ANALOG SYNTH ...  
A full SYNTHESIZER on one board including MULTIMODE FILTER:    • A full analog SYNTHESIZER on one boar...  
Designing a VOICE CARD for a POLYPHONIC SYNTHESIZER:    • Designing a VOICE CARD for a POLYPHON...  
Thinking of a new design for an analog POLYPHONIC SYNTHESIZER:    • Thinking of a new design for an analo...  
Polykit-6 Demonstration:    • DIY digital controlled analog POLYPHO...  

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Support me on Patreon:   / polykit  
Website: https://polykit.rocks
Mastodon: https://chaos.social/@polykit
Store: https://store.polykit.rocks

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0:00 - Intro
0:42 - Motivation & design choices
2:12 - Basic synthesizer & polyphony
4:00 - PCB layout excursion
4:56 - DCO
5:43 - State variable filter
6:41 - ADSR
7:06 - VCA
7:17 - LFO
7:29 - Chorus
7:42 - Additional components
8:11 - Conclusion & outlook
9:08 - Demo

Specs are:
6 voices polyphonic analog DCO based on Roland Juno 106 using a single Raspberry Pi Pico
Sawtooth and square signal
PWM control (manual, LFO)
Voice stacking and de-tuning
MIDI input
MIDI pitch bend
MIDI portamento    • Adding PORTAMENTO to Raspberry Pi Pic...  
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)
Roland Juno 60 chorus clone

Attention! This is not for beginners in electronics nor a finished product.

Synthesizer Basics:
   • Video  
   • Video  
   • Video  
   • Video  

Kicad Replicate Layout Plugin: https://github.com/MitjaNemec/Kicad_a...

DCO:
https://blog.thea.codes/the-design-of...
   • How DCOs work, differences in Juno 6/...  

Yusynth VCA: https://yusynth.net/Modular/EN/VCA/in...

GliGli Juno 60 chorus clone: http://gliglisynth.blogspot.com/2014/...

#synthesizer
#polyphonic
#diy