[pulseaudio-tickets] [Bug 95021] LFE channel not synthesized properly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95021

--- Comment #27 from Raymond <superquad.vortex2 at gmail.com> ---
(In reply to Tanu Kaskinen from comment #0)
> According to a report on the mailing list, upmixing a stereo stream to 5.1
> results in bass being removed from the audio. LFE remixing should move bass
> to the LFE channel, but reportedly that doesn't happen.
> 
> I'll mark this as a release blocker. I plan to try to reproduce the bug. If
> I can't reproduce, the blocker status can be removed, and maybe this bug can
> be closed too.
> 
> Here's the original report:
> http://thread.gmane.org/gmane.comp.audio.pulseaudio.general/25574/focus=25705



https://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=979f19a434733afba0480e2ba456cccc98362e05


When enable-lfe-remixing is set, an LFE channel is present in the
resampler's destination channel map but not in the source channel map,
we insert a low-pass filter instead of just averaging the channels.

Other channels will get a high-pass filter.

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