Hope that you was referring to me.
I have a creative audigy 2 ZS; for playback I use powerdvd 5.
My speakers are Creative Cambridge Soundworks 4.1.
No downmix selected; my system is set to work in multichannel.
When I try to test sound, front left and front right speakers sounds at the same time, and not individually; rear speaker don't give problems (they play individually). This problem appear fortuitously, without any apparent cause. Cable connections are correct. Don't know what can be the problem
Moreover, this speaker system don't have any headphone jack; so I'm forced to insert headphone on the same jack of front speakers (with a splitter cable). Sometimes front speakers plays (with the above problem), whereas headphones don't give any sound
Sometimes a reboot solve the problem, but most of the times don't.