MATRIXSYNTH: Yamaha CS-20M like you've never heard before

Thursday, July 13, 2023

Yamaha CS-20M like you've never heard before

video upload by Valmont

"Was tryna mod my CS-20M to get the CS-80 VCF configuration... Doesn't work yet, but has some interesting changes! CS filters have a frequency-dependent Q factor, coupled with a fixed LP filter. The CS-20M bridles the cutoff to max 7.5Khz, if you want to push it further you may lose some of the Q effect. Here I lowered the bandpass feedback R/C pair (R from 820K to 100K), this pushed the Fc but damped the resonance.
I am not quite sure how to change the max filter cutoff without affecting the feedback damping... Maybe some day I'll figure out x)

Tho I was lucky to record a test with a tempo click, so I could add those percussions afterwards! Apart from that this is 100% the CS-20M with no sync, almost no FX. Just everything at max values.


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