From 1975 to about 1985, Sonde gave hundreds of performances in North America and Europe on sound sources of their own invention.
Sonde was founded in 1975 and originally called MuD (an abbreviation of Musical Design).
The group grew out of a course called Music Design taught at McGill University by Mario Bertoncini.
The original members of MuD were Andrew Culver, Pierre Dostie, Chris Howard, and Charles de Mestral.
The Bertoncini concept of musical design is equally central to Sonde's work.