BY MARLON BISHOP BORED OF PLAYING IN 4/4? NEVER mind modern jazz and its crazy meters. For a real mind-bending rhythm workout, aim your ears southward to suss the milieu of Afro-Peruvian grooves. “I studied jazz for a long time, and I could play in all sorts of meters—5/4, 9/8, 11/8,” says Joscha Oetz, an […]