That wouldn't work because I want to be able to "fill in the gaps" (e.g. if we have 0, 1, and 3, the next one should be 2, not 4).

Everything "works" without this uniquification, but I think it'd be a bit confusing. It'll only get worse when we have the ability to crop songs, since you might have several clips from the same song.

I could do this without an index by looking up ringtones by name until I find a name we don't already have, but I figured an index would help us out here.