"Of Sleeping Birds is a symphony for the streets of Cambridge, a composition that the audience carry across the city. It is a soundtrack to the evening streets and parks, to the people and the place.

"We wanted to create a walk through the city, but not a tourist guide, we didn't want to tell people things they probably already knew about when certain buildings were built or who lived where. We wanted to speak about Cambridge through music, to link together a series of different areas into one composition, to use music where words are not enough."

"The speakers act almost like torches or searchlights, the sound reflects and bounces off the walls in each different space, illuminating the different spaces through sound, and because each audience member carries a different 'instrument' in the arrangement there is a kind of dialogue between the participants."

"At some points in the walk the audience splits off into different groups, and may find themselves on the opposite side of a grass common to another audience group, at these points the musical conversation happens between the groups across wider spaces. But the work isn't just for the people carrying the speakers, they are the orchestra, but the whole city becomes the audience."