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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [N56VZ, Realtek ALC663, Black Headphone Out, Right] No sound from Subwoofer in 2.1 mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91568#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [N56VZ, Realtek ALC663, Black Headphone Out, Right] No sound from Subwoofer in 2.1 mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91568">bug 91568</a>
from <span class="vcard"><a class="email" href="mailto:superquad.vortex2@gmail.com" title="Raymond <superquad.vortex2@gmail.com>"> <span class="fn">Raymond</span></a>
</span></b>
<pre><a href="http://colin.guthr.ie/2010/09/compiling-and-running-pulseaudio-from-git/">http://colin.guthr.ie/2010/09/compiling-and-running-pulseaudio-from-git/</a>
you need to ask David whether he has ppa for pulseaudio with lfe filter
AFAIK, Ubuntu 15.10 alpha pulseaudio has LFE filter BUT it is quite unstable
and not suitable for any production computer (numerous bug cannot unlock screen
saver )</pre>
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