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! Please subscribe and like and get notified about upcoming videos on my channel.

Update: schematics and layout files are now up on Github: https://github.com/polykit/polykit-x-voice-card There is a small batch of PCBs on Tindie for sale in case you are interested and would like to support my channel: https://www.tindie.com/products/polykit/full-voice-card-for-a-polyphonic-synthesizer-pcb

GitHub: https://github.com/polykit Mastodon: https://chaos.social/@polykit

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-filters-part-2-pole-mixing-filters

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

Music by LOOK MUM NO COMPUTER https://www.youtube.com/c/LOOKMUMNOCOMPUTER

#synthesizer #diy #analog