In rock music, "Pet Sounds" marked the first occasion in which doubling was used for virtually every instrument, a technique previously limited to classical composers and orchestrators. It was also the first time that a group departed from the usual small-ensemble electric rock band format for an entire album. "I Just Wasn't Made for These Times" was the first piece in popular music to incorporate the Electro-Theremin as well as the first in rock music to feature a theremin-like instrument. According to D. Strauss, the Beach Boys were also the first major rock group to openly challenge contemporary music trends "and declare that rock really didn't matter." "Cue" magazine reflected in 1971 that "Pet Sounds" made "the Beach Boys among the vanguard" and anticipated trends that were not widespread in rock music "until 1969–1970".