on 25 April 1967, less than a week after the final sessions for Sgt. Pepper's Lonely Hearts Club Band. Since the song was not complete, much of the time was spent rehearsing before the group attempted a recording. Three takes were required to achieve a basic track, with a line-up comprising McCartney on piano, Lennon on acoustic guitar, George Harrison on lead guitar, and Ringo Starr on drums. During reduction mixing of this performance, flanging effect was added to Harrison's guitar part and to the piano over the song's coda. On 26 April, McCartney overdubbed his bass guitar part and the four band members, together with Evans and Neil Aspinall, added percussion such as maracas, tambourine, cowbell and extra drums; Lennon, McCartney and Harrison then taped heavily echoed, vocalised shouts. The following night, McCartney added his lead vocal while Lennon and Harrison sang backing vocals, including the "Roll up / Roll up for the mystery tour" lines. The backing vocals were recorded at a far slower speed so that the voices sounded higher when the tape speed was corrected. On 3 May, a brass fanfare and other trumpet parts were added in a disorganised session where the four trumpet players, including David Mason and Elgar Howarth, began the evening without a score. According to Philip Jones, a friend of the session players, they became so impatient at the lack of activity that Howarth wrote out the score himself. A glockenspiel part was also overdubbed over the coda. In author Ian MacDonald's description, the slow progress on the recording was indicative of the Beatles' drug intake during this period and, in the case of Lennon and Harrison, their disinterest in McCartney's film project at the time. The band committed to making Magical Mystery Tour in early September, after the death of their manager, Brian Epstein. The sessions for the soundtrack music ended on 7 November, when McCartney recorded a new barker-style introduction for "Magical Mystery Tour" and traffic sounds were added. The tape loop of traffic sounds was taken from a recording made on a bridge overlooking the M1 motorway and mixed to pan across the stereo image. The spoken introduction replaced an effort by Lennon, which was nevertheless retained in the version heard in the film. The latter version, which includes Lennon promising "the trip of a lifetime", in the middle of the track, also had additional applause and different