Nghost will use the ID3v2 frame 'TPE2' as the album artist.
Originally Posted by DirtyTre
This frame can be set using the Mutagen mid3v2 tool:
The Windows programs mp3tag and foobar2000 can also be used.
mid3v2 --TPE2="Somebody" file.mp3
Easytag cannot be used to set this frame without a patch, and it looks like the Sourceforge forum where the patch had been posted was recently shut down. Boo!
In case this seems confusing and messy, it is! The ID3v2 standard does not describe an explicit "album artist" tag to fit the Artist -> Album -> Song presentation scheme used by most modern player software. The popular iTunes software has set an ad-hoc standard of using the TPE2 frame for this purpose, and Nghost follows suit.