Reading the latest article on SWLing Post here about BBC interval signals, it reminded us of the wonderfully simple and direct “B–B–C” in the tonic scale used on shortwave for the BBC World Service and other transmissions to Africa.

We’ve always loved it and recently used it in a one-minute slightly odd piece from Madtone called “It Is AI, but we created it” for the 60 Sec Radio 2026 contest here, where “anything is possible as long as it’s 60 seconds long.”

The piece is below and features the said BBC interval signal alongside an excerpt of an strange ham radio conversation on 2 metres about AI generated music. We’re not that keen on AI generated music here funnily enough.

The contest is still open, so if you have 60 seconds radio collage, send it to the website here.