A sound art composition, Dawn Rechorused takes a recording of the dawn chorus running initially at normal speed. Then, as the piece progresses, the birdsong gets slower. First to 1/2 then 1/4 then 1/8 of the original speed using imperceptible crossfades. I think it’s amazing how the birdsong changes. When it gets really slow it sounds almost tropical.
It serves to show the fascinating melodic variations of garden birds. The more the original is slowed down, the more varied and unusual the bird’s melodies become. Things that can’t be distinguished at normal speed become clear. Although it’s old-fashioned, slowing down analogue reel to reel tape in this way presents a much more organic and natural quality than trying to slow down modern digital recordings.