This series consists of hand-drawn plans for Sonde’s sound sources.

This series consists of programs and announcements of Sonde events, in event number order.

This series consists of programs of festivals Sonde participated in.

This series consists of audio recordings of Sonde music.

This series consists of scores/instructions for Sonde musical pieces.

This series consists of paper media clippings of events.

This series consists of programs from conferences Charles de Mestral attended.

The Richard Coulter Collection provides extensive documentation for a period of approximately thirty years in the history of the Canadian Broadcasting Corporation (CBC). It constitutes an invaluable resource for research in Canadian music culture, and the CBC in particular and prominent Canadian composers and performers. The Richard Coulter Collection consists of the radio scripts, production information and publicity connected with programs and program series commissioned, developed and broadcast on CBC Radio in Canada in the 60s, 70s and 80s. The collection also contains audio recordings of a portion of the programs produced. The collection features such prominent North Americans such as Glenn Gould and John Cage. It is divided into ten series and contains approximately 17,000 items. The majority of the collection consists of documents and correspondence from Richard Coulter’s CBC office files relating to the CBC radio programs, special events and talent festivals that he produced. These include radio and television scripts, correspondence, administrative files, project reports, concert programs, publicity, promotional information, press clippings, payment information, contracts, production and technical information, scores, and audio tapes.