If you’re looking for a sampling of everything chamber music has to offer – from instrumentation to genre – The Chicago Ensemble is a group not to be missed. With a commitment to American composers of today and dedication to proven works of the past, The Chicago Ensemble has strived to bring variety to their audiences for over 30 years. We talked to Gerald Rizzer, artistic director, about the upcoming “Exhilaration & More” concert on February 24 and 26.…