Doesn't work that way man - when binary lossy compression is performed (esp with filesize reduction), a binary comparison of any kind/algorithm is simply just impossible. What Rich might have meant was an audiophil-istic comparison, but as this is more subjective and varying from ear-to-ear, person-to-person, environment-to-environment etc etc, cannot automate a computer to do that for you.
hence the creation of such websites such as Hydrogenaudio Forums (http://www.hydrogenaudio.org/forums/index.php), for which mass listening tests/discussions are done to average out listening profiles to determine better encoders, sounds, profiles etc. cheers! Edmund > ------------------------------ > > Message: 3 > Date: Tue, 9 May 2006 17:26:22 -0400 > From: "Paul Dejean" <[EMAIL PROTECTED]> > Subject: Re: [mp3encoder] mp3 checker ?? > To: "MP3 encoders development list" <mp3encoder@minnie.tuhs.org> > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > >This is impossible. Only your ears can tell you which sounds closest, > >and other measures of "closeness" are useless for any purpose. > I disagree. > > It is possible to see how different two files are from each other. > For example if you have a 3 byte file (in hex): > 0F 8E 46 > > It would be permissible to say that: > 0F 8C 45 > > Was more similar to the first file than: > 0F 82 45 > Because the values are closer. > > Maybe it might be possible to convert wav -> mp3 -> wav twice (using > different encoding settings) and compare the two wav outputs with each > other and with the original and seeing which one more closely > resembled the original in a similar method. I don't know of any > program that could do this though, although writing one doesn't seem > to be that hard if the two wavs your comparing are the exact same > number of bytes. > The program could go byte by byte and compare the value of the new wav > with the original wav, get the absolute value of the difference and > add all the values for the different bytes together. This would give > you a "score" in a way. > > However Alexander is right when he says that it wouldn't give the > actual difference between the two files, only the technical > difference. Music is much more then mere data. > > Finally my lurking finished :D > ~= sciwzard =~ _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ _______________________________________________ mp3encoder mailing list mp3encoder@minnie.tuhs.org https://minnie.tuhs.org/mailman/listinfo/mp3encoder
