manymanyhaha wrote:What's the advantage of a fixed filter bank (vs not fixed)?
It’s a different way of filtering- instead of sweeping the cutoff frequency of a variable filter, you’re adjusting gain of a bunch of non variable filters. It’s just a different way of subtracting frequencies, compared to a traditional lpf or eq.
The q of the filters is pretty narrow and I think they are 12db/oct for the band pass filters- since the incoming sound is split among the filters, when you lower the gain of a filter to zero you actually remove that frequency entirely, which is kind of cool. You can get really cool resonances especially if you put it in a feedback loop of some sort. I think it was originally designed to shape oscillators to mimic acoustic instruments but I’ve never used one for that.
I’m no expert though I’m sure someone else here can shed more light on the differences between fixed vs. variable.