To be a bit more specific, you first need to remove the encryption from the Blu Ray disc - there are several programs out there that can do this but, AnyDVD HD is probably best - it runs in the background and does not require any additional steps in the extraction process - it is subscription based and costs approx $75 for a 2 years with of updates. Once your BD disc is decrypted you can use either Audiomuxer or DVD Audio Extractor to extract the DTS HD or Dolby True HD stream and convert to mulitchannel flac. Audiomuxer is free and has more features, however, while DVD Audio Extractor costs approx $20, it does the job of extracting and converting to flac in a simpler and more seamless fashion. One other note, once the files have been converted to multichannel flac, I use Foobar 2000 to tag the files with the proper metadata (artist, title, etc) it connects to an online database where you can pull the appropriate ID tag. You can also edit the metadata ( I like to assign specific genre info) and embed artwork (I used my Oppo 103 as my media receiver - it's track/artwork display is more than adequate). Again there are many other programs that can do this but I find Foobar to be the best solution - and it's free.