From the moment they bounded on stage and plunged into a feverish section of Vivaldi's Four Seasons, you knew this evening was going to be something extraordinary.

Three brothers and a cousin of the Broadbent family make up Stringfever on two violins, a viola and a cello - all brightly coloured electric instruments, whose sound is sometimes what you'd expect from a string quartet but more often totally unexpected.

They clown, joke, dance, sing and mix up musical styles in dazzling fashion. The energy and humour is highly infectious.

Their star-turn is for all four of them to play Ravel's Bolero on the cello at the same time. It is done with panache, athleticism, and consummate musicianship.

They also do a musical version of Twenty Questions, playing twenty film themes in quick succession to see how many you can name. I think I got about ten.

The others were those oh-so-familiar tunes that make you want kick yourself when someone else tells you what they were.

The repertoire ranged from Beethoven to the Beatles and the BeeGees, breathtaking Hungarian fiddle playing, Glenn Miller swing, schmaltzy waltzes, and a soothing Adagio by Albinoni.

The finale was the history of music in five minutes.

This was the group's first visit to the Corsham Festival - I do hope they are invited back very soon.