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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - One should be able to modify the volume when audio is mute"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77499#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - One should be able to modify the volume when audio is mute"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77499">bug 77499</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>typedef uint32_t pa_volume_t
Volume specification: PA_VOLUME_MUTED: silence; < PA_VOLUME_NORM: decreased
volume; PA_VOLUME_NORM: normal volume;
PA_VOLUME_NORM: increased volume
Sinks, sources, sink inputs and samples can all have their own volumes
the pulseaudio internal only have volumes but does not have any independent
mute switch
especially the internal working format is float
0.0 mean mute 1.0 mean 0dB
While most sound cards volume control's min volume are not -inf dB but mute
switch is equivalent to -inf dB
for 16bit audio sound card
the range of volume from -inf dB to -96dB is not controlled by hardware</pre>
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