I've noticed this, too. It sounds like the noise you'd get if you were just using [line] to change the frequency. My guess is the cutoff frequency is being sampled and held at the block boundaries. If you put these objects in a patch with [block~ 1], it goes away.
.mmb On Wed, Mar 2, 2011 at 11:25 AM, Luka Princic // Nova deViator < [email protected]> wrote: > > > hi, > > just a quick question, > is it normal or somewhat on purpose that all versions of low pass > filters in iemlib (from lp2 - lp10 and cheb, butt, bess and crit) > exhibit slight high pitched jitter when cutoff frequency is being > dynamicly changed? is it a nature of such filter or just a type of > implementation that somewhat doesn't take care of interpolation (if > interpolation is a problem at all)? > > any thoughts welcome... > > is there a way i could avoid that jitter with these filters? > > is there some other high-pole low pass filter in some other library i > could use? > > sure, i can always use series of [lop~] .. > > > > best, luka > > > -- > sujet est machinique! > Nova deViator ¤ http://deviator.si ¤ http://skylined.org ¤ > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > -- Mike Moser-Booth [email protected]
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