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List:       kde-bugs-dist
Subject:    [Bug 254793] Kmix broke per-channel pulseaudio volume setup when
From:       Colin Guthrie <cguthrie () mandriva ! org>
Date:       2010-11-08 11:34:37
Message-ID: 20101108113438.3C0FC743D0 () immanuel ! kde ! org
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https://bugs.kde.org/show_bug.cgi?id=254793





--- Comment #10 from Colin Guthrie <cguthrie mandriva org>  2010-11-08 12:34:32 ---
The base volume is really not something that you can change. It's a product of
what comes from the hardware. A lot of hardware does not provide this
information and thus Base Volume == PA_VOLUME_NORM == 0dB == 100%

It is only really relevant for initial volume choices for new users and to
display to the user that anything above the base volume can be subject to some
degree of clipping/artefacts.

For reference, some documents about how to present volume sliders is present
here:
http://pulseaudio.org/wiki/WritingVolumeControlUIs#Colouredvolumesliders

No-one has yet implemented such a coloured scheme (with the exception of VLC
which uses a very similar mechanism, in it's native GUI, but with no direct
relation to PA and base volumes. It also uses a completely different
dB->percentage mapping to that used by PA)

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