Hardcoded 44100Hz in enginefilterblock.cpp

[mixxxbot]

Reported by: xorik
Date: 2013-08-06T11:43:06Z
Status: Fix Released
Importance: Medium
Launchpad Issue: lp1208816

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File enginefilterblock.cpp has hardoded sample rating values, which incorrect when sampling rate isn't 44100 Hz.

low = new EngineFilterButterworth8(FILTER_LOWPASS, 44100, (int)s_loEqFreq->get());
band = new EngineFilterButterworth8(FILTER_BANDPASS, 44100, (int)s_loEqFreq->get(), (int)s_hiEqFreq->get());
high = new EngineFilterButterworth8(FILTER_HIGHPASS, 44100, (int)s_hiEqFreq->get()); 

I've made simple test:

1. change filter's frequency to 800-1000Hz http://s21.postimg.org/fy51lk4s7/2013_08_06_131146_689x272_scrot.png
2. kill high and low frequency http://s21.postimg.org/wxe00tfzn/2013_08_06_131156_91x133_scrot.png
3. record some song on different sampling rates and watch spectre: http://s21.postimg.org/8v28325o7/2013_08_06_131254_513x550_scrot.png

You can see wrong result in the 48kHz and 96kHz (higher frequency, than 800-1000), so this need to be fixed.

[mixxxbot]

Commented by: xorik
Date: 2014-01-03T13:25:30Z

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rryan, please fix same bug on filtereffect.cpp :)

https://github.com/mixxxdj/mixxx/blob/master/src/engine/enginefiltereffect.cpp#L16

[mixxxbot]

Issue closed with status Fix Released.