Hmm....
So you are saying this is actually a bug on PDVD8 when S/PDIF out is chosen as Audio Option?
As of right now, I get the following scenarios for differetn audio tracks on movies S/PDIFs out to my 5.1ch Speakers.
DD - Plays DD normally
DTS - Plays DTS normally
DTS-ES - Messages tells me to Upgrade to Audio Pack, won't relinquish playback control until I click on the message box to visit website. Once playback control is regained, the speaker still plays the DTS track.
Back when I was using PowerDVD 5 "normal" version on my old system, I play the same Disc with the same DTS-ES track selected out to the same 5.1ch speaker, no pop up messages told me I needed to upgrade anything and the DTS-ES track played on my speaker (display shows as DTS) without further issues. Like stefan has pointed out, does that mean I am really just sending the signal out to let my speakers do the decoding by choosing S/PDIF?
I had my doubts that this may be a software related issue. But Cyberlink tech support insists that this can only be resolved with the Add-on Pack. Can someone from Cyberlink further confirm?