i'm at around 2900 albums. I did all the un-genred stuff manually. these days a lot of artists seem to make up genres for themselves. If you don't tame that tendency by limiting the number of possible genres, you end up with an un-navigable mess. Sadly it's only 1 genre per album; sometimes two would be very nice.
If you have much of a classical collection, prepare for a major job. Sometimes John Cage's
Ryoanji gets sorted with
Hildgard von Bingham, and that's just wrong.
I divide my classical into
Classical guitar (not Kottke0
Baroque Classical
Baroque Classical Choral
Chinese
Classical
Classical Choral
Classical Pop
Early Classical
Early Classical - Chant
Japanese
Jazz Classical
Metal Classical
Modern Classical
Modern Classical -Choral
NeoClassical
Renaissance Classical
Renaissance Classical - Choral
Romantic Classical
Romantic Classical
The above is probably heresy, there are some horribly complicated ways of sorting classical music, but this helps me find what I want to listen to, and that is the
point!
No matter which automated service you start with, you are certain to run up against a large collection of genrefications that are hopelessly obscure, weird, or flat out wrong.
The only way to fix those is to do it manually.