I have used to enjoy 5.1 sound while playing ordinary stereo music in iTunes. But now with version 7 installed it is gone. WMP 11 still plays music through all 6 channels, but iTunes uses two front channels only. Which is soooo sad.
I have tried messing with QuickTime Audio settings and with Creative CMSS settings for my Audigy 4 sound card. But no result.
Uninstalling QT and installing version 7.0.4 made iTunes unlaunchible.
Anyways after some time of trying to make iTunes believe I have installed QT 7.1 and not old good QT 7.0 I finally found solution.
I have owerwrote QT 7.1 files with these ones from QT 7.0:
QuickTimeQTSystemQuickTimeAudioSupport.qtx
QuickTimeQTSystemQuickTimeAudioSupport.Resources
And voila! It plays 5.1 again and no complaints about old version of QT.
Thought someone else could have the same problem.
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