[sdiy] filter bank and keyboard

[Martin Czech]

Vocoder filter banks or general filter banks are nice, but tend to have
many knobs. Playing in real-time (without analyzer, manually) seems to
be hard.

The KORG PS series shows that "one circuit for one key" approach can be
done. Now, what about having (1st order approach) some keyboard with one
distinct bandpass filter attached to each key, perhaps with velocity? Now
one could play timbre melodies.

Of course, the technical effort is close to ridiculous.  Could be done
with a few voltage controlled filters as well, a hacked polysynth would do.

Any ideas, experiences?

m.c.