I’m interested in simulating real instruments, in my case an accordion. From reading Sound on Sound’s Synth Secrets series, it seems like what I want to do is run a sawtooth wave through a filter bank. Apparently “formants” are important?
I see there are formant modules and there are sophisticated equalizers, but I’m more interested in using fundamental filters to build something myself. I’m using VCV Rack as a prototyping tool and eventually I want to write code that runs on a Teensy.
So, my question is what filters should I use, and is this a reasonable thing to do in VCV Rack? In Teensy’s audio library there is:
- “filter” which is described as “A State Variable (Chamberlin) Filter with 12 dB/octave roll-off, adjustable resonance, and optional signal control of corner frequency.”
- “fir” which is a “finite impulse response filter”.
- “biquad” which is a “Biquadic cascaded filter, useful for all sorts of filtering. Up to 4 stages may be cascaded.”
I know what some of those words mean, sort of.
So, I’m looking for filter modules that are not lovingly-detailed models of real-world filters with all their quirks, but rather fundamental primitives that are useful building blocks. Has anyone played around with this? Any recommendations or suggestions for further reading?