[Article Summary] John Oswald’s circadian sound installation, a time to hear for here, is a permanent installation in the Spirit House in the new Daniel Libeskind Crystal at the Royal Ontario Museum, which opened in June, 2007. The Spirit House is criss-crossed on five levels by bridges that join the galleries on either side traversing an empty harp-shaped void. From these bridges, visitors hear the audio installation. Some sounds can be heard only in a specific location, others are audible from many places. Oswald creates a mobile sculpture of sounds — the timings of sound moments and their combinations are fluid. A sidebar by Anne Bourne discusses Oswald’s artistic process, the contributions of project co-ordinator Laurel McDonald, and the voicing of Qui, a twenty-four part canon that occurs once a day as part of the soundscape. Each of the parts is sung in a different language, representing the diversity of the world cultures existing in Canada.