Yes, that bit's straightforward - but where do I apply it?
That's the dialog you'll see when you select
Customize View>Rules for file display. There's no reason to be afraid of changing
Rules for file display. All they do is filter the items in your library. If a change them doesn't produce the result you want, just change it back. They have no impact whatsoever on the contents of your library. Or do as MrC suggests—experiment on a copy or new view first.
I assume you're using your 100 smartlists with your main audio view. So if you don't want some files being selected by those smartlists, the exclusions would have to apply to that main view. You can create another special child view that does not exclude them, or includes only them, as you prefer. Either way, you would
not select
Use parent scheme rules for file display for that view. In other words, you would have a main view that excludes soundtrack albums, and a separate child view for "Soundtracks" or one for "All, including soundtracks."
For those, simply edit the settings of the Smartlist itself.
He doesn't want to edit his 100 smartlists.
I rate them 1 star, which essentially means (for me): "Songs that I don't want included in any mixes." I then exclude 1 star rated tracks from all of my various Smartlists, via the same method Rick used in the image above (instead choosing "Rating is not 1" as the rule).
I use that trick in a more global way. "Rating is not one star" is one of my
Access Control rules. My access control is normally on, so I see no files in any views that have been rated one star. This allows me to rate anything one star and—poof—it disappears. As you say, it's very convenient for "on the fly" use—like when using Theatre View with a remote. Using
Access Control has the advantage of not requiring the rule to be added to all applicable smartlists and
Rules for file display. Whether it's applicable to this situation is a matter of preference. Having to turn it off to see soundtrack albums may not make any sense—unless you really hate them.