In 2003, Greenwood released his first solo work, "Bodysong", the soundtrack for the documentary of the same name. The soundtrack incorporates guitar, jazz, and classical music. In March 2004, Greenwood's first work for orchestra, "Smear", was premiered by the London Sinfonietta. In May, he was appointed composer-in-residence to the BBC Concert Orchestra, for whom he wrote "Popcorn Superhet Receiver" (2005), which won the Radio 3 Listeners' Award at the 2006 BBC British Composer Awards. The piece was inspired by radio static and the elaborate, dissonant tone clusters of Penderecki's "Threnody to the Victims of Hiroshima "(1960). Greenwood wrote the piece by recording individual tones on viola, then manipulating and overdubbing them in Pro Tools. As part of his prize Greenwood received £10,000 from the PRS Foundation towards a commission for a new orchestral work.