How did Wendy Carlos’s album Switched-on Bach make synthesizer music popular?

Wendy Carlos’s 1968 album Switched-On Bach was pivotal in bringing the synthesizer into the mainstream by shifting its perception from an experimental, dissonant tool to a viable instrument for melodic, harmonious music.1

Before this release, synthesizers were largely confined to avant-garde experimentation. By applying the Moog synthesizer to the familiar, structured compositions of Johann Sebastian Bach, Carlos introduced consonance and traditional harmony to electronic soundscapes. This approach made the technology accessible and appealing to broad audiences, leading the album to reach No. 10 on the Billboard 200 and achieve platinum status.1

Carlos’s technical innovations—including her contributions to the development of filter banks and touch-sensitive controls—further enhanced the instrument's expressivity. The success of Switched-On Bach effectively moved electronic music into the popular consciousness, paving the way for its adoption by major artists like The Beatles, Stevie Wonder, and Emerson, Lake & Palmer.12