Perhaps you have heard of Venezuela’s Sistema Nacional, a program that has turned thousands of young people into accomplished musicians over the past few decades. Here’s a sample of what it produces. Bachianas Brasileiras No. 1 is scored for a small orchestra of cellos, and it requires a group that’s good enough to find a variety of musical colors within the cellos’ dark sonority. This recording from 2006 is a performance as authentic and nuanced as any you’ll hear. Click the image for a link to the video.