hi tim,
maybe the usage of block~ with a blocksize-argument less than 64 would help you, to find an optimum between crackle-less sound and good performance. to increase the interpolation time of the filters will improve the quality of interpolation too. the vcf-filters calculate their z-parameters every 4 samples, sin() and cos() are realized by a 2-point interpolation of a lookup table.
cheers, thomas.
Zitiere Tim Blechmann TimBlechmann@gmx.net:
hi thomas, hi list, working with the iem filters, i experienced some control rate frequencies (48000Hz / 64 smps) while interpolating between values ... this is basically because the filter coefficients are only changed at control rate, not at audio rate. are there any plans to change this behaviour? it would make it easier to have interpolations when changing several parameters without the need to crossfade between several filters ... on the other hand, the filters would become more expensive ... (possibly not as expensive as vcf~s)