[Alsa-user] Setting different default input and output devices

[John T. <jt...@dp...>]

Hello

I am using up to date software from the Debian testing distribution on a
desk top computer.  I do not use modules, all required drivers are
statically compiled into the kernel.

I have, apparently, 3 sound devices, 2 in the case and one in a USB web cam.

cat /proc/asound/cards
 0 [Generic        ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xfeb60000 irq 16
 1 [HDMI           ]: HDA-Intel - HDA ATI HDMI
                      HDA ATI HDMI at 0xfeb64000 irq 36
 2 [U0x46d0x8b2    ]: USB-Audio - USB Device 0x46d:0x8b2
                      USB Device 0x46d:0x8b2 at usb-0000:00:12.0-1, full
speed

The sound output is OK but I cannot get the microphone, which is in the
web cam, to work with any applications.

This works:

:~$ arecord -f S16_LE -d 10 --device="hw:2,0"
/data/Workspace/Temporary/test.wav
Recording WAVE '/data/Workspace/Temporary/test.wav' : Signed 16 bit
Little Endian, Rate 8000 Hz, Mono
:~$ aplay /data/Workspace/Temporary/test.wav
Playing WAVE '/data/Workspace/Temporary/test.wav' : Signed 16 bit Little
Endian, Rate 8000 Hz, Mono

How can I get alsa to use this device with applications?

John