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