Soundcloud - now scans for copyrighted material

on the upside one could use this as a tester for slipping samples through...presumably if it works here then you wouldn't run into trouble copyrighting your songs (presuming they contain copyrighted snippets) officially with library of congress (who likely use a similar algorithm).

funny how backwards (retro-active) intellectual property claims always wind up

  Quote

A robust acoustic fingerprint algorithm must take into account the perceptual characteristics of the audio. If two files sound alike to the human ear, their acoustic fingerprints should match, even if their binary representations are quite different. Note that acoustic fingerprint matching may be a distance measure between feature vectors, and not a straight binary match. Therefore, acoustic fingerprints are not bitwise fingerprints — which must be sensitive to any small changes in the data. Acoustic fingerprints are more analogous to human fingerprints where small variations that are insignificant to the features the fingerprint uses are tolerated. One can imagine the case of a smeared human fingerprint impression which can accurately be matched to another fingerprint sample in a reference database; acoustic fingerprints work in a similar way.

Perceptual characteristics often exploited by audio fingerprints include average zero crossing rate, estimated tempo, average spectrum, spectral flatness, prominent tones across a set of bands, and bandwidth.

Most audio compression techniques (MP3, WMA, Vorbis) will make radical changes to the binary encoding of an audio file, without radically affecting the way it is perceived by the human ear. A robust acoustic fingerprint will allow a recording to be identified after it has gone through such compression, even if the audio quality has been reduced significantly. For use in radio broadcast monitoring, acoustic fingerprints should also be insensitive to analog transmission artifacts.

On the other hand, a good acoustic fingerprint algorithm must be able to identify a particular master recording among all the productions of an artist or group. For use as evidence in a court of law, an acoustic fingerprint method must be forensic in its accuracy.

http://en.wikipedia.org/wiki/Acoustic_fingerprint

i'll test some things too btw

  On 4/5/2011 at 11:40 PM, Scrambled Ears said:

on the upside one could use this as a tester for slipping samples through...presumably if it works here then you wouldn't run into trouble copyrighting your songs (presuming they contain copyrighted snippets) officially with library of congress (who likely use a similar algorithm).

 

funny how backwards (retro-active) intellectual property claims always wind up

in theory yes, but what if this song you made became a chart topping success? then all you need is expensive lawyers with functioning ears

  On 4/5/2011 at 11:28 PM, Awepittance said:

I'll write an article about it for her website if i can find surefire ways.

then they'll read it too, and block it !

it's an arms race, remember.

honestly, my interest in this is fun. it's fun to try and out-clever another nerd.

IMPORTANT: be careful about uploading copyright tracks. too many "violations" and they might axe your account... which would hurt if you paid for it.

Soundcloud was responsible for the phenom Justin Bieber slowed down 800%.

Which a quick Google search leads me to believe is no longer available.

:(