BBC Radio Scotland has turned off the music for a day in a unique experiment.
Bill Drummond wants us to think about a world without music
The move was to mark No Music Day - the brainchild of musician, writer, artist and architect of bizarre stunts, Bill Drummond.
The former KLF frontman challenged people to consider how they view and use music in their lives.
Instead of music, Radio Scotland programmes have included discussions, interviews and a chance to contemplate a world without music.
Drummond came up with the idea in 2005 and this year was the third time he has marked the day.
He chose Wednesday 21 November because it was the day before St Cecilia's Day. She is the patron saint of music.
"There seemed a logic that we fast from music on the day before we may traditionally have celebrated and given thanks for music," Drummond said.
He added: "I decided to have one day without listening to music to give myself some space."
Drummond has appeared on various Radio Scotland programmes during the day to talk about music and avoiding it for 24 hours.
The usual Good Morning Scotland music at 0600 GMT was replaced with other effects.
At 0930 GMT Fred MacAulay and Co sent out the No Music Day Police in a bid to stop the public listening to music on their MP3 players.
The Radio Cafe will feature an in-depth interview with Drummond looking at his career in the music industry and his acclaim as a conceptual artist.
Later, he will take calls on Tom Morton's Show about the piece of music that had the biggest impact on listener's lives.
Iain Anderson will break the No Music Day fast at midnight.
Jeff Zycinski, head of radio, said: "Radio Scotland broadcasts more live music than all the Scottish commercial stations put together.
"Bill's idea was to show how important music was to people by taking it away. The day will also prompt the question - 'What kind of music do we want?'"
Drummond, from Stranraer, is no stranger to attention-grabbing stunts.
In 1994, he burned £1m of his band's earnings on the island of Jura.