The title track of the Beatles' most famous album, "Sgt. Pepper's Lonely Hearts Club Band" -- the song itself, not the album -- was a bit of an anomaly for the group in that it wasn't intended so much as an outstanding track per se as it was one that could serve for the theme tune of the entire LP. Had it not been in the context of the Sgt. Pepper album, it would have been no more than an average Beatles song. As the curtain-raiser to their most grandiose full-length statement, however, it was key to setting the mood of a psychedelic record that was -- unlike previous Beatles albums, and most previous rock albums by anyone -- something of a psychedelic revue and variety show. The illusion of the album being a theatrical presentation of sorts was established by the opening bars of crowd noise and a pit orchestra tuning up. When the Beatles do start playing, it's in a rather heavy, funky psychedelic rock style, paced by stinging hard rock guitar and Paul McCartney's typically forceful, exuberant upper-register soul-rock vocals. As a taster of the kaleidoscopic shifts to come over the course of the next dozen songs, however, it suddenly shifts into an instrumental fanfare that could have been played by a brass band of the 18th or 19th century in a British public park. The McCartney-sung first verse had already made it clear that this was supposed to be a show of some sort, as, like a singing emcee, he presents and introduces the Sgt. Pepper's Lonely Hearts Club Band. Wittily, in the section following the instrumental brass band passage, the Beatles become the fictional Sgt. Pepper's Lonely Hearts Club Band. They announce themselves in a grandstanding fashion and exhort the equally fictional audience (which can be heard oohing, aahing, and applauding at the appropriate audiences) to sit back and enjoy the show. One can almost see the Beatles, decked out in the gaudy band costumes they wear on the Sgt. Pepper sleeve, doing showbiz dance steps in time to the music. There is understated irony, perhaps, in their deadpan delivery of bland showbiz clichés about it being wonderful to be here, hoping that the audience will enjoy the show, and wishing they could take the audience home with them: the Beatles had made a career of undermining show business conventions, and the subsequent program on the Sgt. Pepper album will be anything but conventional family matinee entertainment. Then it's back to the verse, McCartney again taking over in his best belting style and maintaining the imaginary music hall setting by introducing one Billy Shears. Applause and then ecstatic shrieks (a sarcastic reference to Beatlemania perhaps?) follow as the track segues into "With a Little Help From My Friends," the Billy Shears part apparently donned by vocalist Ringo Starr. The "Sgt. Pepper's Lonely Hearts Club Band" song itself would be reprised briefly near the end of the album in a far more rock-oriented version that concentrated solely on the portion in which the Beatles introduced themselves (rephrased so that they were saying goodbye to the audience). Because of its integral position within the context of a semi-conceptual album, "Sgt. Pepper's Lonely Hearts Club Band" wasn't the easiest song to cover, but one superstar would do so immediately. Jimi Hendrix opened his June 4, 1967, show at London's Saville Theatre with his own heavy rock version of the number, although the album had only been out for three days. Paul McCartney was in the audience, and seems to regard it as perhaps the most flattering Beatles cover of all, calling it "one of the great honors of my career" in his autobiography. Hendrix did not record the tune for his studio albums, but would return to it in concert throughout his career; a live version he did at the 1970 Isle of Wight Festival appeared on the posthumous Hendrix in the West album.