4’33 for orchestra, John Cage. wiki
On January 16, 2004, at the Barbican in London, the BBC Symphony Orchestra gave the UK’s first orchestral performance of this work. The performance was broadcast live on BBC Radio 3, and one of the main challenges was that the station’s emergency backup systems are designed to switch on whenever apparent silence (dead air) is detected. They had to be switched off for the sole purpose of this performance.