A rock opera is a collection of rock music songs with lyrics that relate to a common story. Rock operas typically are released as concept albums and are not scripted for acting, which distinguishes them from operas, although several have been adapted as rock musicals. The use of various character roles within the song lyrics is a common storytelling device. The success of the rock opera genre has inspired similar works in other musical styles, such as rap opera.
In an early use of the term, the July 4, 1966, edition of RPM Magazine (published in Toronto) reported that "Bruce Cockburn and Mr [William] Hawkins are working on a Rock Opera, operating on the premise that to write you need only 'something to say'."
Colin Fleming of The Atlantic has identified The Story of Simon Simopath (1967) by British psychedelic band Nirvana as the first recorded rock opera. Later in 1967, Montreal's Influence recorded a long suite titled "Mad Birds of Prey (A Mini-Opera)", which closed out their sole album, which was released in January 1968. Nevertheless, Neil Strauss of The New York Times wrote that S.F. Sorrow (1968) by The Pretty Things is "generally acknowledged as the first rock opera." Although Pete Townshend denied taking any influence from S.F. Sorrow, critics have compared The Who's Tommy to it. Scott Mervis of the Pittsburgh Post-Gazette wrote that, although Tommy was not the first rock opera, it was the first album to be billed as such.Tommy would go on to influence On and On, a rap opera by The Fat Boys and American Idiot, a punk rock opera by Green Day. In an effort to appeal to more modern audiences, opera companies have welcomed more pop and rock influences. The resulting rock operas have met varying degrees of success as the worlds of high art and low art mix. Other notable rock operas include The Who's Quadrophenia in 1973 and Pink Floyd's The Wall in 1979.