" ... I wrote a symphony called Symphonie gaspésienne which expressed ... Canada's east, that is, the province of Quebec, and this work [Altitude] represents Canada's west, that is, the Rocky Mountains. And [these are] the impressions that I received ... upon seeing the Rocky Mountains, the mystery ... and all those things that impress you profoundly and [that] I took in unconsciously, filtered through my consciousness and expressed [themselves] through music."