Gregorian chant is the central tradition of Western plainchant, a form of monophonic liturgical music within Western Christianity that accompanied the celebration of Mass and other ritual services. It is named after Pope Gregory I, Bishop of Rome from 590 to 604, who is traditionally credited for having ordered the simplification and cataloging of music assigned to specific celebrations in the church calendar, although it is known now that he could not have done it as a system for notating music had not been established at the time. The resulting body of music is the first to be notated in a system ancestral to modern musical notation.

In general, the chants were learned by the viva voce method, that is, by following the given example orally, which took many years of experience in the Schola Cantorum. Gregorian chant originated in monastic life, in which celebrating the 'Divine Office' eight times a day at the proper hours was upheld according to the Rule of St. Benedict. Singing psalms made up a large part of the life in a monastic community, while a smaller group and soloists sang the chants. In its long history, Gregorian chant has been subjected to many gradual changes and some reforms.

Dan Gibson (Montreal, January 19, 1922 – March 18, 2006) was a Canadian photographer, cinematographer and sound recordist.

During the late 1940s, Dan Gibson took photographs and made nature films, including Audubon Wildlife Theatre. Dan produced many films and television series through which he learned how to record wildlife sound. He pioneered techniques of recording, and also helped design equipment to optimize results, including the “Dan Gibson Parabolic Microphone”. Some of his early recordings of the 1950s and 1960s were released on LP records, and started his Solitudes series, which was introduced in 1981.

Dan is well regarded for his contributions to the Friends of Algonquin Park, and his dedication to the Algonquin Park Residents Association. Having a lease of land in Algonquin Provincial Park gave Dan and his family (Wife: Helen, Children: Mary-Jane or "Kirkie," Holly, Dan, and Gordon) a unique opportunity to connect with nature, and it certainly fueled his passion for the study, preservation and interaction with wildlife.