mo0

They display Audio info if tracks from the audioswap library were used: https://support.google.com/youtube/answer/94316?hl=en

First we rewrote echonests truescore logic in perl and then altered slightly and implemented some extra checks to further try to exclude false positives. We also believe what they used in the late song/identify API might have been different from what is open sourced in https://github.com/echonest/echoprint-server

Also we pack each individual hash before storing in Elasticsearch and gained at least 50% storage space this way.

Our Fingerprint data is quite different from theirs(unreliable ID3 tags, N versions of same track) which is why we needed some tweaks. So far the matching is still far from perfect...

Whether we will open source the whole thing at some point we don't know yet.

Crawling the internet for mp3s. It took us a couple of months to get to 7m.

Music used in compilations, ads, intros etc are typical usecases. Mixtapes & livesets of course are also great. But when pitch/bpms have been altered more than 1-2% we currently get a lot of false positives. We are still working on finding a solution to this.

Good idea we'll keep it in mind. Bookmarking the ident page and coming back later to check on results will work too