Documents and illuminates Glenn Gould's groundbreaking radio composition, The Idea of North. Matter of North collects essays and source material related to Glenn Gould's landmark 1967 radio documentary The Idea of North. The most famous product (other than his studio piano recordings) of Gould's 1964 decision to abandon the concert stage for the recording studio, it combines Gould's interests in the contrapuntal (by the simultaneous layering of speaking voices) with philosophy and a life-long fascination with the Canadian Arctic. Because the documentary is a multivalent work, the contributors approach the documentary from unique perspectives (sociological, philosophical, music-theoretical, ethnomusicological), each illuminating a salient aspect of the work. The source-material section includes for the first time the complete interview responses by Gould's five participants, along with other important documentation.