Custom text in Filename to Tag? or Combining Fields?

I have searched the forums, only to come up empty so I am not sure this is even possible.

I have a few files that have the FILENAME, which is exactly the same as the TITLE. I need this to stay that way. And the ARTIST, which is completely different but the same for every file.

I would like to make the TITLE tag a combination of the of two, to look like this

Is there either a way to combine the ARTIST and FILENAME, to make up the TITLE tag....or is there a way for me to enter custom info into the FILENAME-TAG option so I can add the name of the artist...(the artist is the same for everyone)

Hope this makes sense.

Thanks in advance.

Make a new action:

Action type: Format value
Field: TITLE
Format string: %artist% w/%_filename%

Thanks so much. I knew there was way to do this. I just recently discovered the REAL power of this program, though I have been using it for years.

Many thanks!