As with many such sites I've used in the past, there are some issues with the data. Gnooks suggested one author, then the same author, but with a typo in the name. Gnoosic suggested Procol Harum, then it suggested A Whiter Shade of Pale (which is the title of the song most associated with Procol Harum).
Yes, since Gnod learns everything on its own, typos are inevitable.
But over time, it learns that two names can mean the same author.
You can help it by voting for typos here:
https://www.gnooks.com/vote_typos
If Gnoosic thinks a name is a band while it actually is a song, reporting the song as a typo of the band helps:
https://www.gnoosic.com/vote_typos
And of course if your input form gives the user any help when they are filling it out, then you can run in to a problem where users choose ABBA more often than Aerosmith or Argent, (more often than they would have), based just on how ABBA is presented first alphabetically.
I got around this issue by not giving any help; the user was presented with a form with blanks for five artist and song name pairs. Which resulted in a crazy amount of typos, which I fixed “by hand” using a pretty lame interface since I wasn’t a good enough programmer to create a better way in 1996. I spent a LOT of time correcting typos.
Hey, cool to meet someone who went down a similar avenue. BubbleRings also looks like a real fun startup.
It used to be a form without typeaheads for years on Gnoosic too.
I never manually fixed typos, but I have put quite some work into making the system figure them out on its own. For example by asking people "Hey, you entered 'The Beatled' which sounds a lot like the popular band 'The Beatles'. Could it be you meant 'The Beatles'?" and then offering buttons for yes/no etc.