I recommend to ‘pad’ them always to 2-digit. Makes it easier to scrape them programmatically with other software. But doesn’t matter to Plex that much.
If all artists on all tracks are the same, you can omit the Album Artist tag. But as soon as only one track has a different artist (even by one character), Plex could “fracture” the album.
So if you want to be on the safe side, populate always Album Artist.
Yes, this is kinda the universally agreed-upon Album Artist to use for samplers.
But you can also “invent” Album Artists for sampler albums, if it makes sense to you.
For instance you could “group” several related samplers under such an invented artist name.
If the album however has a “main” artist and all the others are just kinda contributing, then you should use the main artist as the Album Artist.
Not in Plex atm. You could however use the ‘Related Artists’ input field in Plex, but that is normally used for musically related artists.
