Introduced by Sarah Walker, from the Royal Albert Hall, London. A Prom exploring the music of the radical, controversial and influential German composer Stockhausen, who would have celebrated his 80th birthday in 2008. The programme features two classic pieces alongside works from his recent 'Klang' (Sound) sequence, on which he was working at the time of his death in December 2007 and of which he completed 21 of the projected 24 hours. Plus a performance of Gruppen (Groups) for three spatially separated ensembles. Marco Blaauw (trumpet) Nicolas Hodges (piano) Colin Currie (percussion) Kathinka Pasveer, Igor Kavulek, Bryan Wolf (sound projection) Sound by Design BBC Symphony Orchestra David Robertson, Martyn Brabbyns, Pascal Rophe (conductors) Stockhausen: Gruppen; Klang, Cosmic Pulses for electronics (13th Hour) (UK premiere); Harmonies for solo trumpet (Klang, 5th hour) (BBC commission: world premiere).