The Beatles in Hamburg later Kirchherr met the Beatles at the Hamburg airport and told them Sutcliffe had died of a brain haemorrhage. In 1966, Voormann was asked by Lennon to design the sleeve for the Beatles' album "Revolver", and also played bass on solo recordings by Lennon, McCartney, Harrison, and Starr. In 1995, Voormann designed the artwork for the three-volume CD sets in The Beatles Anthology series. In 1999, Kirchherr published a book called "Hamburg Days" (a two-volume limited edition) containing a set of photographs by Kirchherr and "memory drawings" by Voormann of the Beatles time in Hamburg. The Beatles returned to Hamburg
Revolver (Beatles album) resulted from varying tape speed (or varispeeding) extended to recording a basic track at a faster tempo than they intended the song to sound on disc. During the sessions, Emerick recorded McCartney's bass guitar amplifier via a loudspeaker, which Townsend had reconfigured to serve as a microphone, in order to give the bass more prominence than on previous Beatles releases. Although this particular technique was used only on the two songs selected for the May 1966 single, an enhanced bass sound was a feature of much of the album. Emerick also ensured a greater presence for Starr's bass drum, by