On 20 Apr 2013, at 00:27, Justin Chudgar <justin at justinzane.com> wrote: > https://github.com/justinzane/pulseaudio > > Gentlemen, Ladies and Bots: > > Thanks again for all your help getting me to this point. Based on various > input, I have done a major refactor of what was module-lfe-lp. The actual > filtering code now lives in pulsecore/biquad-filter.c/h so that it may be used > by other modules or by pulse itself. Module-lfe-lp has been renamed module- > lfe-lowpass-sink.c and now relies on biquad-filter to do the heavy lifting. > > I have tried to cleanup most of the fprint and comment cruft and have moved > all doc comments to biquad-filter.h. You will note that I wrote the biquad code > with the assumption that it will get extended to handle other filter types, > like notch and bandpass, as well as 2nd, 4th, 6th and 8th order filtering. This > is not used by my module, but it seemed logical to enable easy extension of > functionality as needed. > > I would appreciate your continued review and guidance. For your convenience, I > attached a graph of the power spectral density comparison for a standard > surround-51 setup with lpfreq=200.0Hz. To my uneducated eye, it looks like > things are working. > > Justin<test_200.png>_______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss Hi Justin, Can you comment on exactly what you measured to make that graph? It looks awfully clean to be an acoustic measurement, but is an odd shape for a signal-level measurement.
