Setting up a microphone

[Angus Leeming]

Angus Leeming wrote:

> Can anyone offer any advice on how to get my microphone working on a
> Fedoda Core 3 machine with a SiS SI7012 sound card? Sound output is fine,
> but I have no input at all.
> 
> The microphone is a cheapo telephony headset plugged into the single
> (pink if that matters!) mic port. Everything works well if I reboot the
> machine under Windows.
> 
> I'm using the KDE frontend to FC3 rather than the Gnome equivalent.
> krec records as expected from the out_soundcard.
> 
> I've fired up kmix and "unmuted" it. Volume level is "high".
> aRts is in full-duplex mode.
> 
> However, when I attempt to record to krec, the VU-meter remains
> obstinately unresponsive.

It turns out that the thing is connected up, but is incredibly muted. I've
really cranked up igain:

$ aumix -q
vol 100, 100, P
pcm 71, 71
speaker 0, 0
line 0, 0, P
mic 90, 90, R
cd 0, 0, P
igain 80, 80
line1 0, 0, P
dig1 100, 100
phin 0, 0, P
phout 0, 0, P
video 0, 0, P

and even so if I literally scream into it then the signal is *just*
registered by krec.

Has anyone got any insights to share?

Angus