The Beatles' Paul McCartney deemed "Pet Sounds" "the record of the time", and in June 1967, the band responded with their own album: "Sgt. Pepper's", which was also influenced by "Freak Out!" AllMusic states that the first wave of art rock musicians were inspired by "Sgt. Pepper's" and believed that for rock music to grow artistically, they should incorporate elements of European and classical music to the genre. Many British groups flowered in the album's wake; those who are listed in "Music in American Life" include the Moody Blues, the Strawbs, Genesis, and "most notably", Pink Floyd. The band's Roger Waters later stated that both "Sgt. Pepper" and "Pet Sounds" "completely changed everything about records" for him.