$setmulti(_mainartists,%artists%)
$foreach(%artists%,$if($not($if($inmulti(%artists%,%artist%),$eq(%artist%,%_loop_value%),$in(%artist%,%_loop_value%))),$setmulti(_mainartists,$replacemulti(%_mainartists%,%_loop_value%,))))
$set(_artistcount,$lenmulti(%_mainartists%))
$if($eq(%_artistcount%,1),$set(artist,$getmulti(%_mainartists%,0)),$if($eq(%_artistcount%,2),$set(artist,$join(%_mainartists%, & )),$if($gt(%_artistcount%,2),$set(artist,$join($slice(%_mainartists%,0,-1),\, ) & $getmulti(%_mainartists%,-1)))))
$unset(_mainartists)
$unset(_artistcount)

$if($gt($lenmulti(%albumartists%),0),
$setmulti(_mainalbumartists,%albumartists%)
$foreach(%albumartists%,$if($not($if($inmulti(%albumartists%,%albumartist%),$eq(%albumartist%,%_loop_value%),$in(%albumartist%,%_loop_value%))),$setmulti(_mainalbumartists,$replacemulti(%_mainalbumartists%,%_loop_value%,))))
$set(_albumartistcount,$lenmulti(%_mainalbumartists%))
$if($eq(%_albumartistcount%,1),$set(albumartist,$getmulti(%_mainalbumartists%,0)),$if($eq(%_albumartistcount%,2),$set(albumartist,$join(%_mainalbumartists%, & )),$if($gt(%_albumartistcount%,2),$set(albumartist,$join($slice(%_mainalbumartists%,0,-1),\, ) & $getmulti(%_mainalbumartists%,-1)))))
$unset(_mainalbumartists)
$unset(_albumartistcount)
)