Smooth linear filter parameter change #1432
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fres is clearly given in absolute cents. it is later combined with fres_mod, which is given in relative cents
interpolation for Q still missing, updating the coeffs when Q changes still missing
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This PR implements a smooth change of the IIR filter parameters
fres(=filter cutoff frequency) andQ. It is meant as a proper replacement for the previous linear smoothing of the individual filter coefficients, see #1345.This PR is supposed to fix the clicks and pops heard in those related issues:
Fixes #1415
Fixes #1417
Fixes #1424
PR Depends on:
#1429
#1430
Open TODOs:
8*FLUID_BUFSIZEcan be shortened