The Princeton University Sinfonia brings together eager, music-loving students to explore symphonic repertory from four centuries. Though rehearsals may wander briefly into philosophical ponderings and technical observations about music, the orchestra offers an escape from the academic side of Princeton. Students share each other’s company and talents in rehearsal on average four hours each week. Each semester concludes with a formal performance in beautiful Richardson Auditorium. Sinfonia also offers its own members a concerto competition each spring semester. Ruth Ochs is in her twelfth season as conductor of the ensemble.