15 Dec
2014
15 Dec
'14
4:59 p.m.
Hi,
On Mon, Dec 15, 2014 at 03:41:45PM +0000, Claude Heiland-Allen wrote:
On 15/12/14 14:49, Alexandre Torres Porres wrote:
Do any of you know if they're Butterworth or what?
I'm not sure how much difference it makes for low-order filters (biquad has 2 poles and 2 zeros). The differences really matter more for higher order filters, say 8 poles or more...
You could waste time calculating coefficients for a biquad cascade (the process is quite involved - see the mkfilter package online), but I'd just use the ones already made in iemlib...
There's also a 3rd order BW in the docs, if you're interested in the inner workings: 3.audio.examples/H13.butterworth.pd
Ciao
Frank Barknecht _ ______footils.org__