In this video I’m going to take a look at the finished voice card for a polyphonic synthesizer. It is a complete synthesizer with multimode filter on one board!
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Update: schematics and layout files are now up on Github: https://github.com/polykit/polykit-x-...

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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...  

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Website: https://polykit.rocks
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Store: https://store.polykit.rocks

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Voice Card Specs:
• A single oscillator with saw, triangle and pulse output
• Multiple VCAs to blend between different input signals, a main VCA for the envelope and a panning VCA for stereo output
• An additional external input that can be mixed in, eg. a noise signal
• One envelope generator for the VCA. It can also modulate filter frequency and resonance, also with an inverted signal
• A pole mixing multimode filter with 8 filter responses:
◦ 4P LP
◦ 2P LP
◦ 4P HP
◦ 2P HP
◦ 4P BP
◦ 2P BP
◦ 3P AP + 1P LP
◦ 4P N
• There are multiple options two switch and blend between different signals and filter responses
• PWM, FM and synchronization inputs

0:00 – Intro
0:48 – Test & Setup
1:35 – Functionality
2:25 – Multimode Filter Demo
4:50 – Outlook & Conclusion

Pole Mixing Filters: https://electricdruid.net/multimode-f...

Spectrum Analyzer and Scope: https://friture.org/

Music by LOOK MUM NO COMPUTER    / lookmumnocomputer  

#synthesizer
#diy
#analog