Michael Schachter is set to lead a 100-voice choir on “Make Music Day,” where the Przekrój Foundation’s floating sculpture, “Baby You” will float above Milwaukee’s Veterans Park. As the 112-foot-long baby-shaped balloon floats above the city, a chorus of over 100 singers will give the world premiere of “Przekrój’s” cappella choral commission. Schachter’s new music for “Baby You,” which he {…}