Metropolis Ensemble, Sandbox Percussion, and musician/composer Erik Hall team up this summer to create a large-scale arrangement of Simeon ten Holt’s minimalism work “Canto Ostinato,” at the Brooklyn Botanic Garden. The event entitled “Biophony: Solstice” takes place on the summer solstice, with over 30 percussionists, 4 keyboards, and 16 strings and saxophones. The dual sunrise and sunset performances will culminate {…}