BBC Radio 3's Composer Of The Week is a guide to composers and their music. The podcast is compiled from the week's programmes and published on Friday, it is only available in the UK.
http://www.bbc.co.uk/programmes/p02nrvd3
Bach in Cothen
Donald Macleod explores Bach's six years in service at the court of Cothen. It gave him the opportunity to explore fresh musical ground and open himself up to new styles of music making