Tom Service celebrates the 90th birthday this week of American composer John Williams, with tributes from fellow composer David Newman, conductor Dirk Brossé, violinist Anne Sophie Mutter, Williams's son Joseph, and Clive Gillinson, who played cello in the orchestra for many of Williams's best-known scores, including Star Wars and E.T.

Also, an interview with Hungarian conductor Ivan Fischer as he returns to the UK with his Budapest Festival Orchestra in an all-Stravinsky programme, and a tribute to American composer George Crumb who died this week - Tom talks to David Harrington of the Kronos Quartet and Rakhi Singh of Manchester Collective about performing Crumb's seminal work Black Angels.

Plus, music inspired by trees - from Estonian folk musician Mari Kalkun, a Scottish highlands project from sound artist Phoebe Riley Law, and Treephonia, a collaboration between composers at the Royal College of Music and Kensington Gardens in London.