The ubiquitous E-flat minor triad of the CPR (Canadian Pacific Railway) train horn connects the various sections, just as the transcontinental railway was instrumental in unifying the country. In the Prairies we hear the noon siren from a small town in Alberta, along with various typical ambient sounds such as wind in a wheat field and a humming power line. Another set of horns and whistles announces the arrival in British Columbia amidst the Rocky Mountains, and the work ends at noon in Vancouver with the daily sounding of the O Canada Horn.

In a live performance, the 12 instrumentalists are spread out left to right like a map of Canada, the strings and winds representing the 10 provinces, and the percussion and trumpet the two territories (as they were in 1991). The performers accompany the tape by imitating its pitches and musical gestures, and near the end when the O Canada horn is sounded, they react like the fractious political regions they represent, only to finally drift back into unison with the dying reverberations of the horn.

The source materials for the tape are recordings of Canadian soundmarks made in each province by the World Soundscape Project at Simon Fraser University during a cross-country tour in 1973. All sounds are heard at their original pitch but are stretched in time, often to a hundred or more times their original duration. The extended versions allow the listener to hear out the inner harmonics inside these dramatic and unique sound signals, and it is these pitches which are picked up by the live performers and amplified. The suspension of the sounds may also give listeners the space in which to explore their own inner associations with this aspect of the Canadian cultural heritage.

The title refers to Canada’s official title as a nation, a designation suggested by Sir Leonard Tilley, one of the Fathers of Confederation, based on Psalm 72: “He shall have dominion also from sea to sea, and from the river unto the ends of the earth.” The work was commissioned by Alex Pauk and the Esprit Orchestra, Toronto, to whom the work is dedicated.