The probability of 6 guessing correctly out of 9 is...1/4 * 1/4 * 1/4 * 1/4 * 1/4 * 1/4 * 3/4 * 3/4 * 3/4(i.e. 6 people do something with a 1 in 4 chance and 3 people do the opposite, i.e. something with a 3 in 4 chance)... but we then have to multiply that by what's called 9C6, that is how many ways there are of picking 6 people from 9 people, because we don't care which 6 people are right. 6C9 is the same as 9C3, i.e. the number of ways of picking 3 people from 9 people = 9!/(3!*6!) = 9*8*7/3*2So, the whole thing comes to 0.008652. Pretty unlikely.That's not a p-value however. The p-value would be slightly larger because it would be the probability of 6 OR MORE people guessing correctly, not of PRECISELY 6 guessing correctly, which is the number above.So, we calculate the probability of 7 guessing correctly...0.001236And of 8...0.000103And of 9...3.8147E-06So, summing those...The probability that 6 or more people would guess correctly with a 1/4 chance is 0.001, so that's our p-value. Highly significant
I can probably even provide the original sound files if people want to try it themselves
Being often confronted with claims that DTS and especially Dolby 5.1 sounds like 'crap' compared to lossless surround
Quote from: krabapple on 22 March, 2012, 01:33:07 PMI can probably even provide the original sound files if people want to try it themselvesWho can resist that? A link to the original discussion would be interesting too.
FWIW I don't think there's any general belief that 755kbps DTS is transparent. Ditto 384kbps AC-3 (not tested here).
QuoteBeing often confronted with claims that DTS and especially Dolby 5.1 sounds like 'crap' compared to lossless surroundI certainly wouldn't say they sound like crap! I've never heard a lossless surround file, but I have a shelf-full of concert DVDs, most with Dolby or DTS surround. Some of the BEST sound I've ever heard comes from these DVDs. When the DVD offeres an "apples-to-oranges" choice between lossless LPCM stereo and lossy surround, I'll always choose the surround track And, I'd say my "best-sounding" 5.1 DVDs sound better than my "best sounding" CDs. Again, apples-to-oranges with totally different recordings on the DVDs & CDs. (I've also got a few lousy-sounding 5.1 DVD concerts.)So, maybe I'm a sucker for surround... And since I'll choose lossy 5.1 over lossless stereo, it doesn't sound like crap to me!
btw, the test author has also since offered up a test of hi rz vs redbook.....https://groups.google.com/group/surroundsou...a5ca293f8c20d24
Wow - a DVD audio disc image. That's real handy for an ABX test!
I can only listen in stereo, and I cannot hear any difference between the four selections in the stereo mixdown (as presented by fb2k as the second track in the AOB).However, none of these stereo mixdowns are 2496 lossless tracks. They're all devoid of real content above 24kHz. Two have what I would judge to be distortion above 24kHz, but it's not real content. There's a sharp filter at 24kHz.
I might try to listen to pair of channels from the 5.1 mix, in stereo. Though that's kind of cheating, and I don't think I have any software that will let me do this anyway.Cheers,David.
The hotlinked Hotfile link below leads you to a DVD-audio disc image that contains four 5.1 24/96 tracks of the same audio material encoded as: - unaltered original MLP 5.1 24/96, - DTS 5.1 (755 kbps), - DTS 5.1 (1510 kbps), - DTS 24/96 5.1 (1510 kbps). DTS-HD MAS 2.50.20 was used for DTS encoding and AudioMuxer with ArcSoft DTS decoder was used for DTS decoding.
Of course -- here you go:here's the thread specifically for the testhttps://groups.google.com/group/surroundsou...86c0bcccd987acc
OK, suggests the lossless recording went through a 48kHz SR step at some point. I can ask grill (the test author) to comment on the track specs and conversion workflow. Your mixdown software doesn't resample at 48kHz, does it?
Quote from: krabapple on 23 March, 2012, 11:23:17 AMOK, suggests the lossless recording went through a 48kHz SR step at some point. I can ask grill (the test author) to comment on the track specs and conversion workflow. Your mixdown software doesn't resample at 48kHz, does it?It's the stereo mixdown, revealed in fb2k as a separate track from the 5.1 version, which I'm guessing is the stereo mixdown "automatically"(?) generated using coefficients in the MLP stream (i.e. not really a separate track on disc). It's certainly coming out as a 96kHz wave file.
OK, I've checked, and on the stereo mixdown, two of the four versions are identical. I mean absolutely bit-identical.Either this stereo mixdown is something weird/different, or there's a simple mistake.Cheers,David.
OK, I've checked, and on the stereo mixdown, two of the four versions are identical. I mean absolutely bit-identical.Either this stereo mixdown is something weird/different, or there's a simple mistake.
Hi, you can probably mount the ISO in a virtual drive and then extract the .wav files with DVDAExplorer. If you are using a Windows OS that is, for a Mac I wouldn't know...