[sdiy] Filter Banks & CSound

[jbv]

Ian,

> I used a single transistor circuit for my resonators -- just a phase-shift
> oscillator with a bit of degeneration to set the Q.  I started with nominal
> Q values around 20, but had to increase this somewhat to get 10 dB contrast
> with all the bands turned up.  My design has variable amplitude on each
> filter and variable Q in sub-banks of six frequencies.  That way I can --
> for example -- do some formant shaping at low frequencies and timber
> enrichment at high frequencies at the same time.
>

Do you have any schematics available, at least for 1 band ?

Thanks,
JB