This viola arrangement of Joy to the World is in the key of D. Select the image below for a printable PDF of the melody. Visit the Joy to the World Strings Play-Along page for more versions of this song, so you can play it with other string instruments. If you are looking for the carol in a different key, visit the main page for Joy to the World. To play along with wind or brass band instruments, use the version in the key of B flat. More Christmas songs for viola.