From the campus of the University of California, Berkeley, this week's From the Top features the winning ensemble of KDFC's Local Vocals High School Choir Sing-Off and, at 120 singers, it's the largest choir ever featured on the program. We meet a 17-year-old pianist with a moving story to tell about losing access to her beloved piano for financial reasons and how she overcame that situation ... and a young string quartet performs the rhapsodic first movement of Debussy's string quartet in G major, Op. 10.