Comment 50 for bug 1246929

APLAY

**** List of PLAYBACK Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: ALC892 Analog [ALC892 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: SB [HDA ATI SB], device 3: ALC892 Digital [ALC892 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

ARECORD

**** List of CAPTURE Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: ALC892 Analog [ALC892 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: SB [HDA ATI SB], device 2: ALC892 Alt Analog [ALC892 Alt Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: C615 [HD Webcam C615], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/saucy/qemu-kvm/saucy/view/head:/audio/alsaaudio.c

   .pcm_name_out = "default",
    .pcm_name_in = "default",

pcm.default has been override to use pulse plugin in ubuntu

if your pulseaudio is using hdmi and usb webcam for playack and capture

export DAC_DEV=hw:0,0
export ADC_DEV=hw:0,0

or

if your pulseaudio is using onboard analog for playback and capture

hdmi playback

export DAC_DEV=hdmi:2,DEV=1

alt analog playback ( specify hint indep_hp=1 in early patching and switch independent headphone control to "enable"

export DAC_DEV=hw:0,2

alt analog capture

export ADC_DEV=hw:0,2

webcam

export ADC_DEV=hw:1,0