Composer Harrison Birtwistle, 87

Birtwistle’s work was widely championed by many notable conductors, including Daniel Barenboim, Simon Rattle, Christoph von Dohnányi and Oliver Knussen, as well as soloists like violinist Christian Tetzlaff (who premiered his Violin Concerto in 2011) and pianist Pierre-Laurent Aimard. – NPR