Uh, if you want to do that, I think it would be a lot easier to do

key ~~~ IS ~~~~ (leave blank)

This should make a smart crate with all songs that don't have a key tagged. Sure beats adding 20+ rules.

Thx for the heads up Konix, but I thought it wouldnt work because I tried that easy way at first for another rule I wanted:
if grouping tag is (leave blank), but it didnt show up anything, so I figured it wouldnt work for the keys either, so I tried the hard way instead.
Gonna try now see if it works with the keys.

I think I was confused with "IS" and "Contains", my bad. it works all right.

While I have the chance to have you on my thread Konix, do you know if there's a way I can make a rule where I can have a smart crate showing key fields that do not contain a key (empty) but also that contain something that doesnt pertain to a key (for instance a year, some random letters, or whatever).
I use the key tag as an example, but this type of rule could work in any other tag in order to help me sort out the files where I have tag issues with SL, like for instance I try to edit the year tag and it always revert to something else.


But still, why 20 rules max, is there a logical reason?

Try the latest PB, serato.com
It should fix the reverting tags issue.

thx for the heads up Nik gonna try