Revolver

The music prior to the album Revolver were rock and roll and the band had an overall clean image until they started to experiment with cannabis and LSD.   What had influenced the album in a non-musical way was this book called Timothy Learys' The Psychedelic Experience: A Manual Based on the Tibetan book of the dead.  The way they used the whole studio as an instrument in the recording of Revolver was that they used 8 tape decks in the studio with someone working each one, moving the tape loop to create new sounds.  Some of the things that The Beatles did when experimenting on new sounds were setting up headphones as microphones for violins and putting microphones right in the bell of different instruments to get a unique sound.