Pick of the Day: Radio

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"IF MUSAK be the food of consumerism, pipe on" appears to be the credo of those involved in the booming ambient music industry. Music on the Brain (11am R4) examines our susceptibility to mood-enhancing melodies and the attempts made to exploit it. In this easy- on-the-ear programme, Peter Snow (right) hears from a protest group called Pipedown and from those who believe that background music can stimulate as well as sedate the brain.

There's nothing muted about Janacek's Glagolitic Mass, performed tonight by the BBC National Orchestra of Wales in Performance on 3 (8.30pm R3). The piece is written in Old Church Slavonic and praises the wonders of Slavic culture.