This week the emphasis is on duets, with several for different instruments.
BBC Radio Devon
Brass band music with David Hoyle for your Sunday afternoon.
BBC Radio Leeds
Suzy Klein explores composers' orchestral depictions of weather.
BBC Radio 3
The story of the orchestra who gave the first ever concert at the Royal Albert Hall.
Children from Amersham Music Centre prepare to perform Tchaikovsky's 1812 Overture.
Louise Fryer investigates the inspiration behind Walton's powerful First Symphony.
Long-lost fragments of Sibelius's Eighth, and feedback about the question of applause.
Sue Perkins and Tom Service on the relevance of the symphony in the 21st century.
Sue Perkins and Tom Service explore symphonic nationalism and famous symphonic beginnings.
Sue Perkins and Tom Service explore programme symphonies - plus Mahler and Schnittke.