The Electro-Theremin, often called the Tannerin, is an electronic musical instrument developed by trombonist Paul Tanner and amateur inventor Bob Whitsell in the late 1950s to produce a sound to mimic that of the theremin. The instrument features a tone and portamento similar to that of the theremin (or thereminvox), but with a different control mechanism. It consisted of a sine wave generator with a knob that controlled the pitch, placed inside a wooden box. The pitch knob was attached to a slider on the outside of the box with some string. The player would move the slider, thus turning the knob to the desired frequency, with the help of markings drawn on the box. The Tannerin doesn't actually sound much like the theremins of the time.

The Beach Boys are an American rock band, formed in 1961 in Hawthorne, California. The group was initially composed of brothers Brian, Dennis and Carl Wilson, their cousin Mike Love, and friend Al Jardine. They were managed early on by the Wilsons' father, Murry. The band's leader, composer, arranger and producer Brian Wilson was responsible for writing most of the band's early singles and albums. After signing with Capitol Records in mid-1962, Wilson wrote or co-wrote more than two dozen Top 40 hits including "Surfin' Safari", "Surfin' USA", "Surfer Girl", "Little Deuce Coupe", "Be True to Your School", "In My Room", "Fun, Fun, Fun", "I Get Around", "Dance Dance Dance", "Help Me Rhonda" and "California Girls". These songs and their accompanying albums were internationally popular, making The Beach Boys one of the biggest acts of their time. The band's early music gained popularity across the United States for its close vocal harmonies and lyrics reflecting a Southern California youth culture of surfing, cars, and romance. By the mid-1960s, Brian's growing creative ambition and songwriting ability would dominate the group's musical direction. The primarily Brian-composed Pet Sounds album and "Good Vibrations" single (both released in 1966) featured a complex, intricate and multi-layered sound.