Perhaps because Blu-Ray movies use those type of technology for the audio ? I can assure you that the Z 5500 handle exceptionally well movies,do not just critisize them just because they're Logitech my friend.Not to mention that for a PC,they are among the best 5.1 suuround sound systems on the market.That's my opinion,hate it or love it
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Why do you need DTS HD or DDTHD??
That`s just placebo lol, especially if you use Logitcrap speakers..
Quote:Could someone tell me if the X-Fi HD USB is able to decode DTS-HD Master Audio and Dolby TrueHD ?