xxx@XBMC:/var/log$ aplay -l
**** Liste der Hardware-Geräte (PLAYBACK) ****
Karte 0: DX [Xonar DX], Gerät 0: Multichannel [Multichannel]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 0: DX [Xonar DX], Gerät 1: Digital [Digital]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0

xxx@XBMC:/var/log$ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
front:CARD=DX,DEV=0
    Xonar DX, Multichannel
    Front speakers
surround40:CARD=DX,DEV=0
    Xonar DX, Multichannel
    4.0 Surround output to Front and Rear speakers
surround41:CARD=DX,DEV=0
    Xonar DX, Multichannel
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=DX,DEV=0
    Xonar DX, Multichannel
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=DX,DEV=0
    Xonar DX, Multichannel
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=DX,DEV=0
    Xonar DX, Multichannel
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=DX,DEV=0
    Xonar DX, Multichannel
    IEC958 (S/PDIF) Digital Audio Output