Answer :
The correct answer for this is The Beach Boys.
Who are The Beach Boys?
American rock group The Beach Boys was established in 1961 in Hawthorne, California. Brother Brian, brother Dennis, brother Carl, cousin Mike Love, and friend Al Jardine made up the group's original line-up. One of the most prominent groups of the rock era, they are known for their vocal harmonies, songs about adolescence, and musical creativity. To create their distinct style, they drew inspiration from the music of vintage pop vocal groups, black R&B, and rock and roll from the 1950s. They frequently used unique recording techniques, jazz or classical components, and other aspects, all under Brian's leadership.
Brian served as the group's songwriter, arranger, producer, and de facto leader when the Beach Boys were a garage band led by the Wilsons' father Murry. With "Surfin' U.S.A." in 1963, they had their first big-time hit and launched a run of top-ten singles that captured the "California sound," or the youth culture of southern California that was characterized by surfing, cars, and romance. They were one of the few American rock groups that managed to maintain their popularity during the British Invasion.
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the use of highly sophisticated vocal harmonies, accordions and a bass harmonica, snare drum and timpani answering each other, and a guitar doubled by a harp were examples of unusual techniques (for rock music) that graced an important album of what group?