Going straight to matter - I'm a user of foobar2000 player. And as far as I am concerned the prefered tag for indicating an album artist is %album artist%. However I use mp3tag for a long time and hundreds of albums are tagged using %band% tag. What is the difference between those tags? Which one is better? Please give me some info!
ALBUM ARTIST - full compatibility
BAND, ALBUMARTIST - partial compatibility (if you configure it accordingly to them)
iTunes:
BAND
WMP:
Doesn't support any of them (LOL)
So... As far as I am aware ALBUMARTIST is a complete garbage. ALBUM ARTIST and BAND are both useful.
What is your opinion on that matter? Are there any other utilities/mobile devices to be concerned?
What I also would like to know is a technical issue of that matter:
BAND writes to TPE2 ID3v2 field, right? How about the rest?
And supposing I'll decide to keep more than one tag field. Is there any method to make Mp3tag write them at once? (not using action to copy one field's content to another)
I'm not sure what it has to do with the original subject, but AFAIK, you cannot. Explain what you're trying to do and perhaps someone can offer a solution.
No, that's not possible. Your first instincts were correct. Do whatever you need to write the data into one of the fields and then simply copy the value to the other. If you place all actions in the same action group then it's no more work for you in actual use.