SONDE, formerly le groupe MUD/design musical, is a group of Montreal electroacoustic composers and performers.

Their compositions were generally conceived for live performance on original sound sculptures. Through meditative improvisation, the group's aim was to produce new music with sounds revealed by electroacoustic amplification and transformation.

Active from 1976 to 1986, the members of the group changed from time to time. For most of the tracks in this recording the band was Andrew Culver, Keith Daniel, Charles de Mestral, Pierre Dostie, Chris Howard and Linda Pavelka.

Note: Andrew Culver has been John Cage's assistant for mostly 20 years !