aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Revolution51 [M Audio Revolution-5.1], device 0: ICE1724 [ICE1724]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: Revolution51 [M Audio Revolution-5.1], device 1: IEC1724 IEC958 [IEC1724 IEC958]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Revolution51 [M Audio Revolution-5.1], device 2: ICE1724 Surrounds [ICE1724 Surround PCM]
  Subdevices: 2/2
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1