This French horn arrangement of Ding Dong! Merrily on High is in the key of G (concert C). Select the image below for a printable PDF of the melody. The Ding Dong! Merrily on High Band Play-Along page has more versions of this song, so you can play it with other brass and wind instruments. The string arrangement of the carol is also in the key of concert C, so you can play it with violin, viola, cello, and bass. Visit the Ding Dong! Merrily on High lead sheet page which features the carol in seven different keys. On that page you can find an instrumental range or key that is easier for you, or print an arrangement that allows you to play along with other instruments.
This arrangement of Ding Dong! Merrily on High is in a 4/4 time signature. If you would like to play it at a faster tempo, you can think of it as being in cut time (2/2 time signature). Feeling the half note equal to one beat will make it easier to perform the carol at a quicker tempo.