Originally Posted by noise

you can do that with foobar too

you can probably just use hyphenated genre tags (Jazz - Big Band), then when building your tree, use foobar's amazing scripting to split it into nodes. i'm guessing the $replace function could be used for this. might have to check on the foobar forums to be sure. (i know for certain that Media Monkey can do this, i had my tags set up like this while i was using it as my main player a few years back).

look here for more info - this "Title Formatting" can be used throughout foobar, in everything from playlist columns to status bar text.

Foobar2000:Title Formatting Reference - Hydrogenaudio Knowledgebase

as a fallback, foobar lets you create your own custom tags. anything you want. you can't expect other players to be able to read them, but as long as you use foobar, you can use them just fine.