In 1958, Bagdasarian began experimenting with a novel technique -- recording vocals normally but then speeding up the playback on a tape machine. The process yielded the number one hit Witch Doctor in early 1958, and the phenomenon mushroomed later that year when his Christmas gimmick single The Chipmunk Song spent four weeks at the top of the charts. Alvin's Harmonica reached number three just two months later, and Christmas reissues of The Chipmunk Song charted in the Top 40 over the next four years. #The Alvin Show premiered on prime-time television in 1961, with voices supplied by Bagdasarian. It only ran for one year, but was a success in a Saturday-morning slot. Five more Chipmunks singles charted in the early '60s, and five LPs also did well, including a Beatles cover album in 1964. Although Bagdasarian died in 1972, his son Ross Jr. revived Alvin, Simon, and Theodore in 1979 on Saturday mornings and on the 1980 album Chipmunk Punk. The series became more popular than in the '60s, and albums of the Chipmunks singing country, Christmas, rock, and Hollywood favorites were big sellers, though the Chipmunks didn't enjoy singles-chart success as in the past. ~ John Bush, Rovi