The idea would be: Â add some identifying info. into one of the data tag fields for the music you don't want in the database; and then write a database filter that excludes from the database the files with tags having that info.
Here is the database customization wiki page, which gives examples of how to write customized searches for the database. Â Unfortunately, it's not simply "de-checking" some file boxes.
http://www.rockbox.org/twiki/bin/view/Main/DataBaseAnother way to do this, assuming that the files you don't want in the database are in a particular folder, would be to write a database search that excludes file paths containing that name (or, in the reverse direction, that includes file paths containing a particular name). Â See Example 2 in the database page. Â If you copy and personalize that example, it shouldn't be too difficult to try out.Â