Inspired by the themes of Verdi's Otello, Cleveland Orchestra presents two Breaking Convention concerts this weekend to "highlight composers who have courageously charted their own artistic paths with little allegiance to convention." Tonight's performance features pieces by Reinvere, Walker and Gubaidulina. The concert begins at 7:30 at Mandel Concert Hall. A special concert honoring Black composers takes place at 6:30 at the Reinberger Chamber Hall. A separate program dubbed Breaking Convention: Program II takes place tomorrow night at 8. That concert will also be preceded by a special concert honoring Black composers. Consult the orchestra's website for more info.