[PD-dev] [ pure-data-Bugs-2980564 ] bp~ weird behaviour above 1/4 Nyquist frequency

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Bugs item #2980564, was opened at 2010-04-01 15:51
Message generated for change (Settings changed) made by sistisette
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Category: puredata
Group: v0.42
Status: Open
Resolution: None
>Priority: 6
Private: No
Submitted By: Matteo Sisti Sette (sistisette)
Assigned to: Nobody/Anonymous (nobody)
Summary: bp~ weird behaviour above 1/4 Nyquist frequency

Initial Comment:
bp~ doesn't work properly if you try to set its center frequency above 1/4 of the Nyquist frequency, e.g. above 11250 Hz in the case of 44.1kHz sampling frequency.

If you push the center frequency above that value, instead of raising it, it seems that the center frequency and Q don't change while the GAIN of the filter grows.

Note that vcf~ does _not_ suffer from this problem.

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Comment By: Matteo Sisti Sette (sistisette)
Date: 2010-04-01 15:55

Message:
I'm trying to raise the priority but I get an "update failed" error

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=478070&aid=2980564&group_id=55736