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Re: gnome Microphone

On 12/01/2010 04:47 PM, Camaleón wrote:
On Wed, 01 Dec 2010 14:58:37 +0800, Bob wrote:

Hi I'm trying to get the inbuilt mic on my USB webcam to be the default
mike so it works in pidgin, empathy, sound recorder&  other

8< snip

Maybe your best chance is by editing your "~/.asoundrc" file.

You can use these samples as start point:


Despite my previous experiences that was actually pretty easy.

I did
cat /proc/asound/cards
 0 [Live           ]: EMU10K1 - SB Live! Value [CT4832]
SB Live! Value [CT4832] (rev.8, serial:0x80271102) at 0xec00, irq 21
 1 [U0x46d0x8ce    ]: USB-Audio - USB Device 0x46d:0x8ce
USB Device 0x46d:0x8ce at usb-0000:00:12.1-3.2, full speed

to identify my USB sound device

arecord -D hw:U0x46d0x8ce -d 20 test1.wav
Recording WAVE 'test1.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
arecord: set_params:1053: Sample format non available
Available formats:
- S16_LE

that error message says U8 format isn't available from my webcam but S16_LE is, so

arecord -f S16_LE -D hw:U0x46d0x8ce -d 20 test1.wav
arecord -f S16_LE -D hw:1,0 -d 20 test2.wav

mplayer ./test1.wav
mplayer ./test2.wav

both worked, the later is to check the mic can be referenced more generally so it should continue to work even if I change webcams.

then I just put the text into ~/.asoundrc exactly as they said

 pcm.!default {
         type asym
         playback.pcm {
                 type plug
                 slave.pcm "hw:0,0"
         capture.pcm {
                 type plug
                 slave.pcm "hw:1,0"

then as root
/etc/init.d/alsa-utils restart

I already have
options snd-usb-audio index=-2
at the bottom of /etc/modprobe.d/alsa-base.conf to stop USB sound devices becoming default.

So bingo, thanks for the help.

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