I didn't get no diplomas for nothing I'm doin'. No. Just let them notes come out right ... When trumpeter Louis Armstrong died on 6 July, jazz lost the most important creative force in its history, and show-business one of its most lovable entertainers. Tonight's documentary is an adaptation of an Omnibus programme shown last year in honour of his 70th birthday. It includes an extended interview with ' Satchmo' himself, and looks back over his extraordinary career. Introduced by Humphrey Lyttelton Production assistant RODNEY GREENBERG Producer GEOFFREY HAYDON