[reggoboy]

Groups (all those properties that have a selection dropdown) allow multiple values. So a song could also have both "Bossa Nova" and "Vocal" in "Genres".

Oh right. Good point. Thanks to all of you for the ideas. Feedback:

- Custom Group - this currently has alternate names for songs in it, so it doesn't seem useful for this purpose

- Years - I thought about this, because I have no Years data in my data file. But I ran into two issues: a) Years doesn't have a dedicated filter on the screen; b) filtering for Years = Assigned, after assigning a year to a single song as a test, did not show any results. Maybe it's a bug? Don't know

- Source Type - This is full of data. I don't use it. This might have worked. But it seemed weird to use it.

I ended up using another Collection. A couple reasons:

1) I can add songs in bulk. If I use Genre, many songs already had a Genre assigned. If I try to bulk "change" a group of songs by adding the Genre "Vocal" to songs that already have various genre assigned, I was afraid it would modify the existing Genre values. Using a collection doesn't have that problem.

2) I can use a little mic emoji ? as the name of the collection. Since I already show my collections as the "caption" in my song titles, this will now show up wherever I browse my songs.

3) Back to my original goal, I can easily include/exclude right from the main filter list.

Thanks all!