The award-winning composer Errollyn Wallen offers an insight into what it’s like to write a piece of music. In her memoir, Becoming a Composer, she also looks back on how a girl born in Belize and brought up in Tottenham found herself at home in the world of classical music. Handel was gradually losing his sight in 1751 as he finished what was his last dramatic oratorio Jephtha. The harpsichordist Laurence Cummings conducts a new performance of this biblical tale of faith and sacrifice, at the Royal Opera House (8–24 November; on BBC Radio 3 on 27 January). He explains how Handel’s work has been reinterpreted for today’s audience. Jazz musicians are celebrated for their re-interpretation of classics and improvisation. As the London Jazz festival is in full swing (10-19 November, and on BBC Radio 3), the celebrated jazz singer Emma Smith talks about what happens when the notes on the page are transformed into a performance. Producer: Katy Hickman