[sdiy] Quantizer DAC or PWM?

Roman Sowa modular at go2.pl
Tue Dec 20 12:50:59 CET 2022

Separate Octave and semitone resistor ladders with muxes selecting them 
was the heart of (all?) Yamaha CS-series keyboard controllers.


W dniu 2022-12-20 o 12:41, Florian Anwander pisze:
> Hi
> Am 19.12.22 um 22:54 schrieb Didier Leplae via Synth-diy:
>> Ah yes, a separate output for octaves is brilliant!
> btw Scott rider aka Old Crow used a similar trick to achieve Hz/V 
> characteristics with an 8Bit:
> https://github.com/cs80/CS15_SSK/
> He uses a dual channel DAC MCP4922. DAC #1 is providing different 
> reference voltages for each octave, which then are used by the DAC #2 
> which converts the same twelve note data to a spreading CV the higher 
> the octave / refence voltage from DAC#1 respectively is.
> Florian
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