Hardcoded 44100Hz in enginefilterblock.cpp

[xorik]

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.

[xorik (xor29a)]

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

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

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/7129