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.