It's to the credit of Radio 3's World Routes that the programme often forsakes its London home to forage at global folk's grass roots, with 53 countries visited so far. This two-CD collection includes a few big names such as Mali's Toumani Diabaté, but the emphasis is on local stars and homespun traditions. The all-acoustic mood becomes over-earnest at times – as if folk doesn't do bawdy or whismsy – but there are stunning performances. Cape Verde's Tito Paris yearns, Brazil's Renata Rosa plays wonky mountain fiddle and Justin Vali and Paddy Bush deliver a hypnotic Madagascan string duet.