THE world's first historical folk-rock opera featuring top performers including Rev Hammer and The Levellers comes to the Queen's Theatre, Barnstaple on Tuesday of next week.Freeborn John tells the story of a true English hero and radical (John Liburne) during the Civil War - don't switch off at 'history' because it is essentially a full blown music album performed live on stage by some of the best around.Rev Hammer and the Levellers will be joined by the New Model Army, Maddy Prior, Rory McLeod, Rose Kemp, Phil Johnstone and Harry S Fulcher for some inspiring folk, rousing rock and soulful country.Phone the box office, on (01271) 324242 for ticket information.Tonight (Wednesday) Glitterball in Barnstaple presents Nightfly, a lively band offering some great harmonies and solos in a range of mediums from rock and pop top soul, disco and Motown.Broomhill Hotel at Muddiford near Barnstaple is offering Arthurs, Holby and Richie on Friday night, an exciting jazz trio led by trumpeter Tom Arthurs, plus a special solo session by talented pianist Julie Sassoon. The show begins at 7.30pm. Telephone (01271) 850262 for ticket information.Sod 'em and Sing karaoke will be at Quigley's in Bideford tomorrow (Thursday) - American Idol eat your heart out! On Monday you can catch it back in Barnstaple at Sherry's Tavern.Still in Bideford and the Palladium Club presents Astral Circus on Friday - hopefully they won't cartwheel through the ceiling halfway through the show...Folk rockers The Dambuskers will be appearing at a new venue, the First Inn, Last Out, Bideford, on Saturday.Jazz Footprint obviously make a good impression (groan) since they will be returning to the Joiners Arms on Friday night.The Muddy River Band's brand of blues and R&B has made them popular in the region and they return to the Joiners on Saturday.The classic blues, throaty voice and slide guitar of the Jim Crawford will be the highlight at the George in South Molton on Saturday, when Jim will launch his long-awaited album Roots and Originals. Telephone (01769) 572514 for tickets.The Aggi in Braunton hosts Rob Martell on Friday from 8pm.The White Lion has DJs on offer this Saturday and then on Sunday Amy Newton will host another top open mic session.Cook Island at Mullacott will be opening its mics (Open Mic Night) tomorrow (Thursday) when the Average Blues Band return as your hosts.The Marlboro Club in Ilfracombe will host a poignant memorial gig Friday as it remembers local musician Dan Basset who passed away a year ago. Six bands will turn out from 7pm, with Masdevallia, Elsabub, Falling Apart, Acoustic Glue Stick and Rat Attack all appearing.The gig is free but a collection will be taken for the Aerial Music Centre.