The Beatles (album) stereo only. In the UK, the following album, "Yellow Submarine", was the last to be shipped in mono. The mono version of "The Beatles" was made available worldwide on 9 September 2009, as part of "The Beatles in Mono" CD boxed set. A reissue of the original mono LP was released worldwide in September 2014. The album's sleeve was designed by pop artist Richard Hamilton, in collaboration with McCartney. Hamilton's design was in stark contrast to Peter Blake's vivid cover art for "Sgt. Pepper's Lonely Hearts Club Band", and consisted of a plain white sleeve. The band's name, in Helvetica,
Cultural impact of the Beatles in avant-garde composers such as Karlheinz Stockhausen and John Cage, similarly informed the recording of "Strawberry Fields Forever" and "Sgt. Pepper". Quoting a composer from the UCLA School of Music, "Time" magazine's appreciation of "Sgt. Pepper" recognised the Beatles as having adopted concepts first pioneered by the Cologne group, thereby making an "enormous contribution to electronic music". The Beatles were the first entertainment act to stage a large stadium concert. At Shea Stadium in New York City on Sunday, 15 August 1965, the group opened their 1965 North American tour to a record audience of 55,600. The event sold out