Sound of Joy is an album by Sun Ra and his Arkestra. It features the Arkestral lineup during the last few months of 1956, after trombonist Julian Priester left to join Lionel Hampton, Charles Davis became a regular member of the band, and Victor Sproles took over on bass. It was intended as the follow-up to Jazz By Sun Ra but Transition Records ceased to operate before it could be released.Four of the tracks were included on Sun Ra and his Solar Arkestra Visits Planet Earth, released in 1966.