Pat Farrell;260364 Wrote: > And AccuRip compares the bits you get to previos rips from other folks. > So > if 50 folks using 50 computers get the same data (verified by a strong > checksum) you can be confident that you got the same bits as they did. > > This does *not* prove that you got the right bits, only that lots of > people got the same answer, so it is highly likely that you all have > the > right bits.
Just to expand on this a bit, I'll take a file that many of us are familiar with, Led Zeppelin's -Stairway to Heaven-. I have it encoded in FLAC, its size is 45.7 MB, that's 47 929 093 bytes, 383 432 744 bits. But FLAC is compressed (losslessly), so when I decompress it to the data pulled right off the CD (WAV) it grows to 81.3 MB, 85 201 244 bytes, 681 609 952 bits. Now, if AccurateRip says that someone else got the exact same checksum, even one other person, it says that this other person got EVERY ONE of the 681 609 952 bits identical to me. If JUST ONE of those SIX HUNDRED EIGHTY ONE MILLION SIX HUNDRED AND NINE THOUSAND NINE HUNDRED AND FIFTY TWO bits were off, there would be no match. And the odds of us having the -exact- same error in those hundreds of millions of bits are infinitesimally small. Therefore an AccurateRip match, even with one other person, is a nearly foolproof indication the rip was bit-perfect. Add other people, another one, another ten, another fifty, and the odds against the rip being in error become astronomical, you need scientific notation to convey the odds against it. -- Mark Lanctot Sean Adams: "So you mean, aside from the fact that Squeezebox does not do 96KHz, why doesn't it do 96KHz?" ------------------------------------------------------------------------ Mark Lanctot's Profile: http://forums.slimdevices.com/member.php?userid=2071 View this thread: http://forums.slimdevices.com/showthread.php?t=42435 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
