'He said a lot of strange things... and he wasn't always sober either!' - Leif Ove Andsnes on Sibelius

Picks from across the week on In Tune. Sean talks to a pair of great Russian maestros in Valery Gergiev and Vasily Petrenko; Norwegian pianist Leif Ove Andsnes talks Sibelius and Beethoven; and young British composer Hannah Kendall tells us about her BBC commission for Chineke! Orchestra's debut Prom.