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<blockquote data-quote="Lehmden" data-source="post: 1066149" data-attributes="member: 109222">HI.Optical can't transport DTS-HD at all. SP/DIF is limited to DolbyDigital and DTS 5.1Do you have two sound devices active in Windows (I think so)? Probably HDMI and OnBoard sound via SP/DIF. It's a really complicated setup with this. HDMI to TV is capable of transporting DTS-HD but most of the TV can't playback any kind of DTS audio. Your AVR connected via optical could probably be able to playback DTS-HD but the optical wire isn't able to transport it...At first you need to setup the proper audio device. If you want the sound played by your AVR you need to use something like &quot;DirectSound Digital Audio SP/DIF&quot; (exact naming varies depending on your hardware) Then you need to adjust LAVF (startmenu - lav filters - audio configuration) to &quot;bitstream&quot; DTS and Dolby Digital only, not DTS-HD, Dolby True HD or Dolby Digital Plus. None of them are transportable via optical cable. And at last you need to tell MP to use the SP/DIF audio device and the LAVF codecs. This is in MP Config - Codecs... Normally the sound should be played by your AVR without issues then (no sound on TV at all this way but full 5.1 sound on your AVR). DTS-HD can be bitstreamed without dtsdecoder.dll. But on optical wire only the 5.1 core DTS, not the expanded 7.1. If you want full DTS-HD you need to connect your AVR via HDMI (if it's possible at all).</blockquote>

[QUOTE="Lehmden, post: 1066149, member: 109222"] HI. Optical can't transport DTS-HD at all. SP/DIF is limited to DolbyDigital and DTS 5.1 Do you have two sound devices active in Windows (I think so)? Probably HDMI and OnBoard sound via SP/DIF. It's a really complicated setup with this. HDMI to TV is capable of transporting DTS-HD but most of the TV can't playback any kind of DTS audio. Your AVR connected via optical could probably be able to playback DTS-HD but the optical wire isn't able to transport it... At first you need to setup the proper audio device. If you want the sound played by your AVR you need to use something like "DirectSound Digital Audio SP/DIF" (exact naming varies depending on your hardware) Then you need to adjust LAVF (startmenu - lav filters - audio configuration) to "bitstream" DTS and Dolby Digital only, not DTS-HD, Dolby True HD or Dolby Digital Plus. None of them are transportable via optical cable. And at last you need to tell MP to use the SP/DIF audio device and the LAVF codecs. This is in MP Config - Codecs... Normally the sound should be played by your AVR without issues then (no sound on TV at all this way but full 5.1 sound on your AVR). DTS-HD can be bitstreamed without dtsdecoder.dll. But on optical wire only the 5.1 core DTS, not the expanded 7.1. If you want full DTS-HD you need to connect your AVR via HDMI (if it's possible at all). [/QUOTE]

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