edit: unless you're talking about hash like password hashing but I don't think so?...
Not sure if you saw the rest of my comment, I edited it after regarding merging playlists from YouTube into the site. It's too bad some of the songs are only 30 seconds long (I think this was mentioned regarding using SoundCloud for example as a source of music) anyway I'll try it out, already found a new song so thanks.
The 30 second tracks come from spotify. Their API doesn't provide for a way to get the full track even for authenticated users, so we use an iframe widget for that :/
Anyway thanks for the information. Cool site. The 30 second song thing sucks, songs "eratically jump" I get that it's a preview/suggestion though. Music isn't "free" haha artists have to be paid.
edit: I want to stress the 30-sec gripe isn't to you, it's not your doing but you know things aren't free haha.