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This is the Sweep Performance performed at the SoundWalk of Long Beach, Ca (September 25, 2009). Many thanks to electronic emergency and many that helped out.
The audio consists of 2 channels each with two different excerpts from two different Sweep Performances performed at the SoundWalk.
The actual performance consisted of one performer sweeping with a broom that was wired to a computer. The computer filtered the sound of the broom accentuating it. This sound was then directed back to headphones that were worn by the performer and anyone else that wanted to follow him and immerse themselves in the performance.