Silo #5 is an abandoned grain storage facility in the port of Montréal. A quarter of a mile long and over twenty storeys high, it has a total capacity of five million bushels, or enough wheat to make 230 million loaves of bread. The building was constructed in several stages between 1903 and 1958.

The portion of the structure used by Silophone is constructed entirely of reinforced concrete, measures 200 metres long, 16 metres wide and approximately 45 metres at its highest point. The main section of the building is formed of approximately 115 vertical chambers, all 30 metres high and up to 8 metres in diameter. These tall parallel cylinders, whose form evokes the structure of an enormous organ, have exceptional acoustic properties: most notably, a stunning reverberation time of over 20 seconds. Anything played inside the Silo is euphonized, made beautiful, by the acoustics of the structure. All those who have entered have found it an overwhelming and unforgettable experience.

Silophone makes use of the incredible acoustics of Silo #5 by introducing sounds, collected from around the world using various communication technologies, into a physical space to create an instrument which blurs the boundaries between music, architecture and net art. Sounds arrive inside Silo #5 by telephone or internet. They are then broadcast into the vast concrete grain storage chambers inside the Silo. They are transformed, reverberated, and coloured by the remarkable acoustics of the structure, yielding a stunningly beautiful echo. This sound is captured by microphones and rebroadcast back to its sender, to other listeners and to a sound installation outside the building. Anyone may contribute material of their own, filling the instrument with increasingly varied sounds.