Audigy 2 ZS 7.1
Creative Inspire 7.1
Media player WinDVD 6 and Windows Media Player 9/Creative MediaSource Player.
What you mean by what kind of audio tracks?
I used to watch 5.1 audio dvd with my new setup and have this problem, also i watch divx/xvid movies, not sure what audio encoding they has.
Usually i have this problem on my old system crappy 2.1 speakers and build-in sound card watching divx/xvid movies, i think it will be fixed when i buy new sound card, speakers, but its still here.
Probably some of this divx/xvid use 5 channel, i used AC3 filter v70b but never configured it from control panel.
Could this be reason when i watch 5.1 channel movie but codec configured for 2.1 channel?
And in WinDVD i have Audio set up to "Digital (S/PDIF) out to External Processor" and audio render: direct sound also enable 96KHz/24Bit decoding checked.