Original composition by Alan David Lee (Alby). Performed by Melbourne Symphony, conducted by Markus Stenz, 2006 (Malthouse Theatre, Victoria, Australia).

The ocean has a twilight zone at the depth that sunlight penetrates. This zone rises and falls each day in a continuous vertical wave across the planet. As the sun sets and rises, thousands of fishes, zooplankton, and crustaceans follow the twilight light level -- known as an 'isolume' -- up and down in turn to feed and seek protection near the dark. This daily cycle represents the largest migration of animal life on Earth. So dense are the animals at the isolume that sonar is reflected in all directions, creating what is known as the 'sound scattering layer'. This piece is inspired by this massive ecological phenomenon at the ever shifting interplay of light and dark in the sea.

Cover image courtesy Wood Holes Oceanographic Institution https://www.whoi.edu/multimedia/otz-pumps/

ISOLUME

Demo excerpt from Diving Bell by Hashemoto, recorded live 11 Oct 2011
www.hashemoto.com  

Hashemoto: Diving Bell (excerpt)

This is the first song from our three-track release of October 2010, recorded live in Canberra. www.hashemoto.com


Hashemoto: Diving Bell

This is the second song from our three-track release of October 2010, recorded live in Canberra. www.hashemoto.com


Hashemoto: Leadlight

This is the third song from our three-track release of October 2010, recorded live in Canberra. www.hashemoto.com


Hashemoto: Whitecaps

Excerpt of 'Aspirance', commissioned and recorded by Duo Sol: Caroline Almonte - piano, and Miki Tsunoda - violin.

alby