Tag Panel Query

Is it possible in the Tag Panel in mp3tag to auto-fill the discnumber as 1 and pull the Album Artist info from the Artist field?

No, that would be a job to do using Mp3tag actions. You need two Format Value actions.

Action type: Format value
Format string: 1

Action type: Format value
Format string: %artist%

Either place these in separate action groups, or into a single group if you want to more easily execute them both at the same time.

It's ALBUMARTIST (without the blank).

Thanks all.

I prefer ALBUMARTIST without the blank, but if he wants 'ALBUM ARTIST' with a blank, that's how it's done.