The late Peter Schickele was a composer who is often known better for his alter-ego — PDQ Bach. The fictional composer’s biography included being born on April 1, 1742 — the 21st of Johann’s 20 children, the youngest and oddest of Johann Sebastian’s 20-odd children. But Peter Schickele also had a significant body of work as a wonderful “legitimate” composer. Today’s Beautiful Music is his SERENADE FOR THREE for clarinet, violin, and piano played by Prima Trio.