blu-ray audio


If I use an external dac with a blu-ray player, apparently I cannot get lossless audio for movies unless it is an HDMI dac. Per oppo:

"Due to bandwidth limitations, high resolution audio formats such as Dolby Digital Plus, Dolby TrueHD, DTS-HD High Resolution and DTS-HD Master Audio cannot be sent through the coaxial or optical digital audio output. A reduced resolution version of the same audio track will be output instead. To listen to high resolution audio formats in their best quality, please use the HDMI connection..."

My question is if I use my computer to play blu-rays or ripped bluray mkv  files and use a usb dac will I get lossless audio?  Using an ifi idsd.  thank you. 

 
majorc

You might get 24/48 audio (which is what most blurays are produced at), but it will be 2-channel stereo.  This is most likely the 2-channel stereo audio track on the bluray that can be used for Dolby Pro Logic surround decoding.  Multi-channel audio cannot be sent across USB.  Per licensing, only HDMI can send multi-channel DTS-HD or TrueHD.

Even if the computer did send some form the DTS signal, the USB DAC would not be able to decode it.

Thank you. The software (jriver) is decoding the lossless audio to pcm and that is being transmitted (downmixed to 2 channel) to the usb dac.  Q is whether licensing or bandwith limitations would prevent this - I would think not - it sure sounds like the dts master audio and dolby tru hd tracks to me. Just looking for audiophile quality for Blu-ray soundtracks without having to purchase an oppo (and perhaps better than an oppo).