По умолчанию идёт микрофон гарнитуры:
$ arecord | aplay
Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
Playing WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
underrun!!! (at least 211,649 ms long)
Список устройств:
$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: Camera_1 [USB 2.0 Camera], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Camera [Vega USB 2.0 Camera.], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: SB [HDA ATI SB], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: SB [HDA ATI SB], device 2: ALC662 rev1 Alt Analog [ALC662 rev1 Alt Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Со второй нужно, которая Vega