[mythtv-users] asus m2a-vm hdmi spdif problem

[S]

Ha all!

I posted number of ours earlier, and I'm not sure if arrived for the list.
I' have a motherboard Asus M2A-VM HDMI with AMD 4200+ X2 processor and
2GB RAM. I try to use MythBuntu.
I' try to get digital sound from coax spdif connector, but can't get.
aplay -L output are:
default:CARD=SB
    HDA ATI SB, ALC883 Analog
    Default Audio Device
front:CARD=SB,DEV=0
    HDA ATI SB, ALC883 Analog
    Front speakers
surround40:CARD=SB,DEV=0
    HDA ATI SB, ALC883 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=SB,DEV=0
    HDA ATI SB, ALC883 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=SB,DEV=0
    HDA ATI SB, ALC883 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=SB,DEV=0
    HDA ATI SB, ALC883 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=SB,DEV=0
    HDA ATI SB, ALC883 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
null
    Discard all samples (playback) or generate zero samples (capture)
iec958:CARD=HDMI,DEV=0
    HDA ATI HDMI
    IEC958 (S/PDIF) Digital Audio Output

What I need to get for digital sound from iec958 output?

Thanks
Suttyom