Display chosen text if Tag field is blank

[redged]

Hello

Just wondering how I can display a pre determined text if the Tag field is empty (perhaps using the TagUpdate)?

Apologies if this has already been cvered but struggling to find the answer.

I use MEDIATYPE tag for Vinyl, Mp3, Box Set, Single etc. However this is a recent addition to how I do my library and I have thousands of files with the MEDIATYPE tag left empty. As these were digital rips, I wish to insert Digital, currently it shows as [unknown].

   

I have tried the following in my tagUpdate text file but hasn't worked

@MEDIATYPE=
+MEDIATYPE=Digital

As always thanks in advance for your help.

Ged