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 -------------- next part -------------- A non-text attachment was scrubbed... Name: test_200.png Type: image/png Size: 61801 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20130419/b53145f7/attachment-0001.png>
