Expatiation is a multi-channel sound installation created by PJ Davy, Jordan Lewis and myself on the amplification of micro events, first installed at the Sound Diffusion Lab at the University of Brighton in March 2017.
Four test tubes, suspended from the ceiling drop water into four petri-dishes located on a plinth beneath.
When a droplet hits a dish, a contact microphone triggers a Max/MSP patch to playback one of several hundred individual water drop sounds through a custom-made quadraphonic reverb.
The sound is output first from the speaker facing diagonally to the dish, with no reverb applied. After a short delay, it is output from the two adjacent speakers, and lastly - the speaker farthest from the dish. This diffusion between the four speakers creates an effect of the drops rippling around the space.