[music-dsp] Filter Envelopes in Polyphonic VA synths
vepeta00 at oppi.edu.ouka.fi
Tue Apr 9 05:26:11 EDT 2002
> Does the filter envelope usually control the cutoff, resonance, both or the mix between
> filtered and unfiltered audio?
In most synths one envelope controls cut off (and another amplitude). In my opinion, every "good" VA synth should have at least 3 envelopes (ADSR): one hard-wired to amplitude, another hardwired to filter cutoff and the third available as a modulation matrix destination. The modulation matrix is a good way to implement flexible parameter modulation. With a mod matrix you could for instance route envelope 3 (or LFO1) to filter resonance or velocity to oscillator pitch when sync is on. Many more powerful VA synths feature a modmatrix these days.
I think well-chosen 16 sources and 16 destinations should be enough for all but the most bizarre modulations. With at least 4 independent modulation routings, why not eight as we are talking about a soft synth?
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