[pulseaudio-discuss] hda intel + Line-In + ext. mic

[Tanu Kaskinen]

pe, 2010-02-12 kello 13:26 +0200, Николай kirjoitti:
> Hi
> 
> В Чтв, 11/02/2010 в 15:53 +0200, Tanu Kaskinen пишет:
> > to, 2010-02-11 kello 00:23 +0200, Николай Коротинский kirjoitti:
> > > Hi all,
> > > 
> > > I have a laptop Amilo Si 3655 and Ubuntu 9.10 64
> > > 
> > > I have 2 mic: internal and external.
> > > Internal mic work successfully.
> > > But external Mic and Line-In work as outputs.
> > > 
> > > Line-In output surround channel.
> > > Mic output Center and LFE channels.
> > > 
> > > But sometime I need external Mic and Line-In.
> > > How I can change channels on Line-In and Mic?
> > 
> > First of all, you will need to use some other profile than surround. So
> > start by switching to stereo output (or stereo duplex) profile in
> > pavucontrol's Configuration tab.
> 
> 
> Default profile is Stereo Duplex. Selecting Stereo Input just disable
> Mics,
> But Mic1 (external) and Line-In still play sound.

If the profile is Stereo Duplex, pulseaudio won't use the surround
channels, so how do you determine that they are playing sound? Are you
playing surround content with some media player that bypasses
pulseaudio? Or do you mean that even when playing stereo content through
pulseaudio, while the Stereo Duplex profile is selected, sound comes out
of those connectors?

> I have 3 input ports Mic1 (external), Mic2 (internal) and Line-In.
> While I change input ports - Mic1 and Line-In still play sound.
> Work just Mic2 (internal) 

If switching the ports doesn't do anything useful, then I think
pulseaudio just doesn't handle your sound card. The amixer output that
you attached showed that there are two elements with name "Capture" and
two elements with name "Input Source". Pulseaudio uses the element name
as a unique identifier, so these duplicate elements might be the reason
why port switching doesn't quite work for you. I wonder whether the
problem should fixed in pulseaudio or alsa: should pulseaudio support
duplicate element names, or should alsa refrain from exposing duplicate
element names...?

-- 
Tanu Kaskinen