Amateur and professional singers & instrumentalists meet in Brooklyn’s Cadman Plaza Park and parade to the Archway under the Manhattan Bridge in DUMBO while performing the Prelude movement of Bach’s G-Major Cello Suite No. 1 — very, very, very slowly. The result is a half hour, slow-motion harmonic wash of sound conceived and produced by James Holt. All instruments and vocalists welcome; no sight-reading experience necessary! In order to fully participate, please download one of the following four tracks onto an mp3 player, and bring it along with your instrument (or voice!) and a pair of earbuds to use during the performance.