As a summer season of unbridled music-making gradually begins to pump up the volume, this is one week to make sure that radio makes itself heard.
Live from St David's Hall is the final of the Cardiff Singer of the World competition (Radio 3 and BBC2 has a simultaneous broadcast on Saturday from 7.30-10.30pm). Judges are Dame Joan Sutherland, Marilyn Horne, Yevgeny Nesterenk and Stuart Burrows.
From the sublime to the indefatigable: the Rolling Stones have been on the road for generations. A vintage concert from California in 1981 features some of their greatest hits, on Radio 2, Saturday, 5.30-6.30pm.
Two more musicians compete in the semi-finals of the Radio 2 Young Musician of the Year (Sunday, 4.03-4.30pm). Seeli Toivio, 21, of Finland, will play Faure's Papillon; Brian Byrne, also 21, from County Meath in Ireland, is the first jazz pianist to enter the competition. He will play his own improvisation of Young and Heyman's When I Fall in Love.
Europe's largest and most eclectic music festival, Glastonbury, will be broadcast live on Radio 1 from next Friday to Sunday, including a marathon on Saturday of 18 hours of pop, rock, dance and folk. For the first time, the BBC's television cameras will be there to bring the revelry from Somerset, accompanied by such musical stalwarts as John Peel, Jools Holland and Steve Lamacq. The bands are traditionally kept secret but Radiohead fans could be in for a treat.