I have checked the audio from the dvd of the first night in wembley 86 and this is what audiochecker says about the stereo track:
01 -=- 01 - One Vision.wav -=- MPEG (95%)
02 -=- 02 - Tie Your Mother Down.wav -=- MPEG (95%)
03 -=- 03 - In The Lap Of The Gods Revisited.wav -=- CDDA (100%)
04 -=- 04 - Seven Seas Of Rhye.wav -=- CDDA (99%)
05 -=- 05 - Tear It Up.wav -=- MPEG (95%)
06 -=- 06 - A kind Of Magic.wav -=- MPEG (95%)
07 -=- 07 - Under Pressure.wav -=- MPEG (95%)
08 -=- 08 - Another One Bites The Dust.wav -=- MPEG (95%)
09 -=- 09 - Who Wants To Live Forever.wav -=- MPEG (95%)
10 -=- 10 - I Want To Break Free.wav -=- MPEG (95%)
11 -=- 11 - Impromptu.wav -=- CDDA (100%)
12 -=- 12 - Brighton Rock Solo.wav -=- CDDA (100%)
13 -=- 13 - Now I'm Here.wav -=- MPEG (95%)
14 -=- 14 - Love Of My Life.wav -=- CDDA (100%)
15 -=- 15 - Is This The World We Created.wav -=- CDDA (100%)
16 -=- 16 - (You're So Square) Baby I Don't Care.wav -=- CDDA (100%)
17 -=- 17 - Hello Mary Lou (Goodbye Heart).wav -=- CDDA (100%)
18 -=- 18 - Tutti Frutti.wav -=- MPEG (95%)
19 -=- 19 - Bohemian Rhapsody.wav -=- MPEG (95%)
20 -=- 20 - Hammer To Fall.wav -=- MPEG (95%)
21 -=- 21 - Crazy Little Thing Called Love.wav -=- MPEG (95%)
22 -=- 22 - Radio Ga Ga.wav -=- MPEG (95%)
23 -=- 23 - We Will Rock You.wav -=- MPEG (95%)
24 -=- 24 - Friends Will Be Friends.wav -=- MPEG (95%)
25 -=- 25 - We Are The Champions.wav -=- MPEG (95%)
26 -=- 26 - God Save The Queen.wav -=- CDDA (100%)
and this about the DTS track
01 -=- 01 - One Vision.wav -=- CDDA (100%)
02 -=- 02 - Tie Your Mother Down.wav -=- CDDA (100%)
03 -=- 03 - In The Lap Of The Gods Revisited.wav -=- CDDA (100%)
04 -=- 04 - Seven Seas Of Rhye.wav -=- CDDA (100%)
05 -=- 05 - Tear It Up.wav -=- CDDA (99%)
06 -=- 06 - A kind Of Magic.wav -=- MPEG (95%)
07 -=- 07 - Under Pressure.wav -=- MPEG (95%)
08 -=- 08 - Another One Bites The Dust.wav -=- MPEG (95%)
09 -=- 09 - Who Wants To Live Forever.wav -=- MPEG (95%)
10 -=- 10 - I Want To Break Free.wav -=- MPEG (95%)
11 -=- 11 - Impromptu.wav -=- MPEG (95%)
12 -=- 12 - Brighton Rock Solo.wav -=- MPEG (95%)
13 -=- 13 - Now I'm Here.wav -=- CDDA (100%)
14 -=- 14 - Love Of My Life.wav -=- MPEG (95%)
15 -=- 15 - Is This The World We Created.wav -=- MPEG (95%)
16 -=- 16 - (You're So Square) Baby I Don't Care.wav -=- MPEG (95%)
17 -=- 17 - Hello Mary Lou (Goodbye Heart).wav -=- MPEG (95%)
18 -=- 18 - Tutti Frutti.wav -=- CDDA (100%)
19 -=- 19 - Bohemian Rhapsody.wav -=- MPEG (95%)
20 -=- 20 - Hammer To Fall.wav -=- CDDA (99%)
21 -=- 21 - Crazy Little Thing Called Love.wav -=- CDDA (100%)
22 -=- 22 - Radio Ga Ga.wav -=- CDDA (100%)
23 -=- 23 - We Will Rock You.wav -=- CDDA (100%)
24 -=- 24 - Friends Will Be Friends.wav -=- CDDA (100%)
25 -=- 25 - We Are The Champions.wav -=- CDDA (100%)
26 -=- 26 - God Save The Queen.wav -=- MPEG (95%)
what do you think?for me it's really strange that some tracks are CDDA and other are MPEG sourced...
Actually, the LPCM 2-channel track takes 1300918272 bytes, which is more than the 1249408364 bytes it takes when converted to normal PCM WAVe. Lossy? Definitely not, at least for the 2-channel track. The 6-channel DTS track, however, is very compressed, as there's no way it takes 3 times the space the 2-channel track takes, or else the audio alone would take more space than both audio tracks+video take.
And how the checker verifies individual tracks, when the disc is split among a few sections each lasting a few tracks, so each is bound to he encoded the same way. And if the total is bigger than raw WAVe, then I don't see where the loss is. ;)
pittrek wrote: unless they started with a lossy digital source of course
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Quite possible. Or perhaps the original tapes constitute a comparatively inferior quality recording (compared to current-day recordings), which gives a 'false positive' as MPEG on modern software? Mixing and mastering for vinyl records does not work in exactly the same way as digital mixing and mastering, after all, and the quality of the final product depends on different variables for respective vinyl and digital recordings. Some songs may have cuts in the spectrum resembling MPEG, for instance.
I've ripped the Friday night PCM audio to 16 bit 48khz WAV files using DVD Audio Extractor. There is no frequency cut off, it goes all the way up to 24 khz - I doubt it is lossy. It could potentially be AAC sourced, but it's hard to tell since none of those programs detect decent AAC as lossy and the actually recording is heavily processed with compression and heavy de-essing on Freddie's vocals. I've tested One Vision with Audio Checker, and it came back as 100% "CDDA", so not sure what bootLuca is doing.
"Mixing and mastering for vinyl records does not work in exactly the same way as digital mixing and mastering"
Regardless of whether that statement is true or not, how is this relevant? This is a freshly digitally mixed recording, taken from a high resolution digital transfer of the multitracks. Mixed and mastered for digital release no less.
Audiochecker is, I'm afraid, full of shit.
It just told me that Track 5 of my father in law's Andrea Bocelli CD is 99% an MPEG. Two other tracks are only 99% and 92% CCDA.
Bullshit.
None of the tracks are flagged up in Audio Checker as being anything other than 100% CD Audio and the frequencies don't cut out to suggest anything other than high res audio - so what are you still going on about?