"A Fifth of Beethoven" is a disco instrumental recorded by Walter Murphy and the Big Apple Band. It was adapted by Murphy from the first movement of Beethoven's Fifth Symphony. The record was produced by noted production music and sound effects recording producer Thomas J. Valentino. It was one of the most popular and memorable pieces of music from the disco era. The "Fifth" in the song's title is a pun, referencing a liquid measure approximately equal to one-fifth of a gallon, a popular size for bottles containing hard liquor, as well as Beethoven's Fifth Symphony from which the song was adapted.