The festival, which started in 1964, will run from 29 July to 1 August and includes Beth Orton and Tom Robinson.
Singer/songwriter Loudon Wainwright III, whose acting credits include the classic comedy Mash and Tim Burton’s film Big Fish, will also be performing.
The festival is being sponsored by BBC Radio 2.
Also featured are indie band The Divine Comedy and folk-punk revellers the Levellers who return to the festival with an acoustic set.
The Cambridge band Ezio are also playing the festival. The duo leapt to prominence when the Prime Minister Tony Blair chose one of their tracks on BBC Radio 4’s Desert Island Discs.
Also included on the bill are:
- Country music band Asleep at the Wheel
- Folk festival favourites the Oyster Ceilidh Band
- The Dixie Hummingbirds, a gospel band formed in the 1920s
- Portuguese diva Mariza.