[Bug 412862] Re: AOD250 microphone problem

[Seano]

A little further investigation has shown the following:


The meter on the pulseaudio volume control input devices tab shows L/R cancellation regardless until there is a difference between the faders.

A pulseaudio volume meter showing levels for Internal Audio Analog
Stereo shows mic audio on both channels but it's meter on the recording
tab shows nothing until there is a difference between the faders on the
input devices tab.

gnome sound recorder shows level on it's meter even when there appears
to be cancellation and it has nothing showing on it's meter on the
recording tab. Pulling down the left fader on the volume control input
devices tab affects the level on it's meter whereas the right fader has
no affect but this should not be taken as evidence of anything as it may
be that the sound recorder is metering only left.

What do I suspect is happening - that the metering in Pulseaudio is
showing difference between left and right rather than the sum and that
skype is being clever and selecting that same 'bus' because it expects
it to be mono rather than selecting the stereo bus and doing it's own
downmix.

Just a guess.

--sean

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AOD250 microphone problem
https://bugs.launchpad.net/bugs/412862
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