I have several concert video BD discs with 24/48 or even 24/96 stereo AND surround-sound audio -- clearly, high-resolution audio and BD video are not mutually exclusive. So why is Led Zeppelin releasing the 24/48 audio only as a separate audio-only BD? (Note: I am assuming the standard "Celebration Day" BD has 16/48 audio. If it had 24/48 audio, then there would be no need for the audio-only BD.)
If the answer is, as I suspect, that the 24/48 audio could have fit onto the standard "Celebration Day" BD but that Led Zeppelin (or, more accurately, Atlantic Records) wants sound-quality geeks to buy two copies of the show, then I might have to consider boycotting this release and not buy either the video BD or the audio-only BD!
They cheaped out and used a single layer Blu-ray disc so the 24-bit audio wouldn't fit on the BD-Video disc. All they had to do is use a dual-layer disc and the 24-bit audio would have easily fit. I feel kinda cheated knowing this.
I'm a huge fan of surround music, but honestly I've never understood the live audio only releases. Studio albums mixed in surround are great, but live concerts in surround with no video just doesn't work IMHO.