"Initially I wanted to hear the birds as precisely as possible so I filtered out human noises from the ferry building, conversation, noises, etc... and slowed the remaining bird song quite a bit (1/8 speed), which dropped the pitch as well. Doing so exposed a variety of resonances inherent in the space as well as the melodic power of the bird song. It brought to mind a cathedral or large cave. The work was composed with that in mind, a vocal incantation in a resonant space, using the bird song as the foundation. There are layers at 1/8th speed, 1/4 speed, and full-speed. The only non-bird sound are the "bells" heard at the beginning- an ambient scrape found in the original recording. There are no additional sounds from other recordings, and little to no processing. Edits, simple eq, and balancing account for almost everything."
Part of the Sounding Nature project - for more information, see http://www.citiesandmemory.com/sounding-nature
