[PD] good filter with no externals

[cyrille henry]

hello,

here is a lowpass resonant filter that i made based on gunter [fft_convolution] abstraction.

changing the filter coef use lot's of CPU, but without changing the coef this filter is nice.

it can be improve in different way, but the most important is probably the way to write the impulse response on the table.
please tell me if you see a fast way to do it.

have fun
Cyrille
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