Filter to Exclude Filenames

In a folder, I have MP3 files which look like the following:

MyFile.orig.MP3
MyFile.MP3
MyFile2.orig.MP3
MyFile2.MP3
etc.

I want to see all the MP3 files except files with ".orig." in the filename.

What filter expression would work?

Thanks in advance.

NOT %_filename% HAS ".orig"

Yes - that works.

Thank you!