From the very first days of silent film to the contemporary CGI blockbuster, music has always played a crucial role in cinema, guiding the audience throught the story, keeping their attention, fixing time and place. The film composer Debbie Wiseman and critic David Benedict discuss with Matthew Sweet the ways in which movie makers have created mood with music. Recorded in front of an audience at the Royal College of Music as part of this year's Proms Plus events.