flac dev - Mar 2014 - lossless compression's limit : 53% ?

Hello,

What is nowadays lossless compression's limit (tested on a large library of
music samples, because of course, it depends on the music we do the tests
on) ?

I often see 53% - 62% of original WAV file's size. (
https://xiph.org/flac/comparison.html )

Are there algorithms that can losslessly compress to, say 40% of original
WAV file size (I don't mind about encoding time here) ?

Is there a figure that seems to be a limit : 50 - 53 % ?

Best regards.
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op 25-03-14 10:01, Nouvelle Collection schreef:
> What is nowadays lossless compression's limit (tested on a 
> large library of music samples, because of course, it depends 
> on the music we do the tests on)
I did the comparison that's on xiph.org/flac/comparison.html. I 
can assure you, that's pretty much as good as it gets with 
current codecs. OptimFROG has filters for quite a lot of special 
cases, but still it can't compress much better than it does now, 
so I guess we're pretty much at the limit of what is possible.

For a more comprehensive review of obscure codecs, take a look 
here: http://www.squeezechart.com/audio.html As you can see, the 
smallest file takes 1200 times longer to encode than FLAC's 
slowest setting, but improves only 6%. As you can see, that 
codec was made in 2007, so there has been no improvement in the 
last few years, and I don't expect any until quantum computing 
algorithms are developed :P