The novelty inherent in an eight-voice scatting choir resulted in dozens of television and radio appearances around the world during the mid-'60s. Somehow, the group also managed to record follow-up LPs Going Baroque in 1964 and Anyone for Mozart? one year later. Both were Grammy winners as well -- though Best Performance by a Chorus definitely wasn't the most competitive category at the awards ceremony. In an era when vocal choruses increasingly slipped down the easy listening slope, however, the Swingle Singers moved in precisely the opposite direction. In 1969, a subsidiary group called Swingles II premiered Sinfonia, a composition by the avant-garde composer Luciano Berio that also utilized the New York Philharmonic.

After a move to England in 1973, Ward Swingle recruited a new Swingle Singers and changed musical direction, incorporating material from the avant-garde as well as the Renaissance era and jazz. Swingle himself retired from active performance in 1984, but continued on as music director. The group continued to tour the world into the '90s, performing operas by Azio Corghi and Berio, appearing in compositions with ballet companies, and holding various classes and workshops as well.