#872: Loss of sound with two sink inputs
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Reporter: AdamK | Owner: lennart
Type: defect | Status: new
Milestone: | Component: daemon
Resolution: | Keywords:
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Comment(by coling):
Could this be a result of artefacts from the "Flat Volumes" feature?
(pulseaudio will always try and use h/w volume whenever possible to reduce
overhead and thus power consumption etc - and thus when there is only one
stream playing, the volume of that stream will always be the same as the
underlying alsa volume - although the concept of a "system volume" is
still maintained and presented to the user even if it's not really used
like that underneath!)
To test this, load up alsamixer -c0 and have a look at the bars for Master
and maybe PCM too. When your second "sink input" (source is not the right
term as a "source" is a recording device - e.g. a mic. I've fixed the
summary to reflect this.) starts (and you hear your dropout), do you see
them jump about a bit?
If so, you can work around this by disabling flat-volumes in daemon.conf.
Git master already has support to minimise the fallout from this - which
stems from there being no way to synchronise mixer changes in alsa - so if
this is the problem you are seeing, it's likely fixed already :)
--
Ticket URL: <http://pulseaudio.org/ticket/872#comment:1>
PulseAudio <http://pulseaudio.org/>
The PulseAudio Sound Server
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