"Built-in 5.1 Audio Subsystem, but 5.1 working as 2.1"

Hi,
I bought a new system with an Intel Desktop board - D946GZIS, which has built-in SigmalTel STAC9227 audio codec with a 6-channel (5.1) support.
I have made all the speaker connections properly and verified via SigmaTelAudio control provided.
If I run the Speaker test all the 5 speakers including the Sub are working. But, while playing songs thru any player the 5.1 player is working as a 2.1 :-(
Please do suggest
Thanks
Nataraj

MP3s and stuff are stereo and only have two channels. If your sound card/on board audio has some kind of upmixing feature like CMSS/Pro Logic II or some equivalent thing you should be able to get sound from all your speakers.

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"Built-in 5.1 Audio Subsystem, but 5.1 working as 2.1"

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