Robert Worby presents a tribute to the late composer Mauricio Kagel, who died in September 2008. In a previously unheard interview, Kagel discusses his early days, being self-taught and surrealism. Composer Christopher Fox joins Robert to discuss Kagel's legacy. And there's another chance to hear Acustica, Kagel's epic late 1960's work for experimental sound producers and loudspeakers, performed by Apartment House and recorded at the 2005 Cut and Splice festival. Plus sound artist Bill Fontana talking about his new installation Speeds of Time 2008 at Tate Britain.