Over at the ‘Unofficial Blu-ray Audio and Video Specifications Thread‘ on the AVS Forum, a Russian contributor has put up specifications for a couple of Blu-ray audio discs. Note, there’s no particular format difference between Blu-ray audio and regular Blu-ray. It’s just that the former has little or no video (just puts up a static picture or whatever), so as to allow more bits for the audio.
The second disc — DIVERTIMENTI – TrondheimSolistene — is incredible. The audio is so dense that the whole 69 minute program is repeated in two *.m2ts files to cover the five different formats in which it is presented. You get it in 24 bit, 192kHz, 5.1 channels in three ways: losslessly compressed DTS-HD Master Audio (12990kbps), losslessly compressed Dolby TrueHD (13122kbps) and uncompressed LPCM (27648kbps). It is also presented in stereo 24 bit, 192kHz LPCM (9216kbps) and regular 5.1 channel Dolby Digital (640kbps). Actually, you get a sixth version as well: the DTS-HD Master Audio track contains a standard (albeit nominally 24 bit) DTS version at 1,536kbps.
This seems like an ideal disc to use to compare audio standards.