https://bugs.freedesktop.org/show_bug.cgi?id=95021
--- Comment #2 from Ahmed S. Darwish <[email protected]> ---
This can be reproduced in the following manner:
1) Create a 5.1 null sink:
$ pactl load-module module-null-sink sink_name=NULL_5.1 \
channels=6 \
channel_map=front-left,front-right,rear-left,rear-right,front-center,lfe
2) Play out the null sink output through its monitor:
$ parec -d NULL_5.1.monitor | pacat
3) Play a high-bass audio file, like this one:
http://darwish.chasingpointers.com/pub/sine-wave-50Hz-0.8amplitude.mp3
(Produced using Audacity tone generator)
(4) High-bass should be heard.. Open `pavucontrol' and redirect the
mp3 player output to the NULL_5.1 sink.
Result: almost all of the bass is stripped
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