[pulseaudio-discuss] [PATCH 2/2] volume: Add LFE balance API

[Tanu Kaskinen]

On Fri, 2015-09-18 at 14:47 +0200, David Henningsson wrote:
> The gnome/unity-control-center UIs have a master volume slider, and
> three sub-sliders: balance, fade, and subwoofer. Balance and fade
> use PA's set_balance and set_fade APIs accordingly, but the subwoofer
> slider sometimes does unintuitive things.
> 
> In order to make that slider behave better, let's add a LFE balance
> API that these volume control UIs can use instead. With this API,
> the UI can balance between "no subwoofer" and "only subwoofer" with
> "equal balance" in the middle, which would make it more consistent
> with the behaviour of the other sliders.
> 
> BugLink: https://bugzilla.gnome.org/show_bug.cgi?id=753847
> 
> Signed-off-by: David Henningsson <david.henningsson at canonical.com>

As a user, I don't expect a subwoofer slider to mute other channels.
Have you got any support from other people for your proposed subwoofer
slider behaviour?

If I understand correctly, the bug is about strange relation between
the overall volume slider and the subwoofer volume slider. I fully
agree with Britt Yazel (comment #10). However, I don't know if the
subwoofer slider can be made sane without an API that supports the
"overall volume" concept properly (which pa_cvolume doesn't do).

-- 
Tanu