[kirktsao]

Thanks your help!~
I don't know why is difficulty to use pastebin or imgur and imagebin.
Mabye political restrict.
I read uNi repsonse and other people reply again and again.
I understand my spdif can not output HD audio.Because i didn't have any AVR or other decode device.

Code:

Audio output device    This is the device(s) you use to play LPCM or audio decoded by XBMC such as mp3's and FLAC.
Note: If XBMC plays a file which has audio that the system does not support (thus the above capable receiver option is not selected e.g. DTS capable receiver is not selected) then it is either transcoded to a supported format or decoded and sent as LPCM, in both cases this will be the audio device used.

I think i should disable all capable receiver except AC3. Is that correctly?