October 2012 BPF was changed to use double-precision floats (git commit: 72412f63affa94f69e2ea7539e21831a1d0d3e01). GlitchBPF can be used as drop-in replacements to get the old behavior back. Good for very noise and glitchy sounds where the filter [nearly] blows up.
The input signal.
Centre frequency in Hertz.
The reciprocal of Q. Q is conventionally defined as cutoffFreq / bandwidth, meaning rq = (bandwidth / cutoffFreq).
Output will be multiplied by this value.
This value will be added to the output.