song could be "the Beach Boys' psychedelic anthem or flower power offering," he based the lyrics on the burgeoning psychedelic music and Flower Power movements occurring in San Francisco and some parts of the Los Angeles area. He described the lyrics as "just a flowery poem. Kind of almost like 'If you’re going to San Francisco be sure to wear flowers in your hair.'" Writing in his 1975 book The Beach Boys: Southern California Pastoral, Bruce Golden observed: Capitol Records executives were worried that the lyrics contained psychedelic overtones, and Brian was accused of having based the song's production on his LSD experiences. Brian clarified that the song was written under the influence of marijuana, not LSD. He explained: "I made ‘Good Vibrations’ on drugs; I used drugs to make that. ... I learned how to function behind drugs, and it improved my brain ... it made me more rooted in my sanity." In Steven Gaines's 1986 biography, Wilson is quoted on the lyrics: "We talked about good vibrations with the song and the idea, and we decided on one hand that you could say ... those are sensual things. And then you'd say, 'I'm picking up good vibrations,' which is a contrast against the sensual, the extrasensory perception that we have. That's what we're really talking about." Wilson said in 2012 that the song's "gotta keep those good vibrations" bridge was inspired by Stephen Foster. Bandmate Al Jardine compared that section to Foster and the Negro spiritual "Down by the Riverside". According to Love, the lyric "'she goes with me to a blossom world' was originally meant to be followed by the words 'we find'", but Wilson elected to cut off the line to highlight the bass track linking into the chorus. Recording and production Modular approach "Good Vibrations" established a new method of operation for Wilson. Instead of working on whole songs with clear large-scale syntactical structures, Wilson limited himself to recording short interchangeable fragments (or "modules"). Through the method of tape splicing, each fragment could then be assembled into a linear sequence, allowing any number of larger structures and divergent moods to be produced at a later time. This was the same modular approach used during the sessions for Smile and Smiley Smile. To mask each tape edit, vast reverb decays were added at the mixing and sub-mixing stages. For instrumentation, Wilson employed the services of "the