Broadcaster Fi Glover hosts a celebration of all things audio. Fi explains her passion for a medium which she describes as being like the best friend you never had. She reflects on the raw power of audio and talks to the broadcasters behind some of the bravest, brightest sounds you’ll hear.

We hear from Zane Ibrahim of Africa’s oldest community radio station, Bush Radio, which began broadcasting illegally under South Africa’s apartheid regime. And Fi is also joined by Kate Hutchinson of London Fields Radio, to discover how a micro radio revolution is underway in a booth in a café in east London.