I’m working on a commission about sound at the moment, and, as I often do when returning to the subject, I am thinking about Alvin Lucier’s I AM SITTING IN A ROOM. This is an electronic piece where a piece of music is played into a room and re-recorded, the process repeated over and over until the music breaks down, not least because some bits of music are absorbed by the room instead of reflected back to the microphone. Any room, therefore, has sound embedded in its fabric, just from having been lived in by people. All houses are haunted by the voices in the walls.

Just finishing: UNDERSTANDING ME, Marshall McLuhan (UK) (US)