World premiere: Concert Hall, Brighton Dome, Saturday May 1

In 2002, these drum'n'bass renegades stirred up praise and controversy with a hypnotic soundtrack to French flick La Haine.

A dark trawl through the lives of three dispossessed young men from a run-down tenement block in Paris, the film paints a stark picture of racial suburban violence, which former Prime Minister Alain Juppe made compulsory viewing for his cabinet.

A perfect outlet for the notoriously political Asian Dub Foundation, you might say, who played live loud and furiously, with melded instruments, sequencers and samplers giving the film an unrelenting urgency.

Now the Londoners with a mission are at it again, kicking off the Brighton Festival with this exclusively commissioned performance to Gillo Pontecorvo's Sixties film The Battle Of Algiers.

So political it was banned in France for a time, the cinematic classic portrays the Algerian guerilla struggle against French colonialists in the Fifties with documentary-style realism.

It was shot with a cast of amateurs and professionals, hand-held cameras capturing the crowd scenes and was screened by the Pentagon last summer as an aid to understanding terrorists' motivation and planning.

"It was a film we really liked, it was a film which fits into the ADF perspective," explains the band's guitarist, 40-year-old Chandrasonic (born Steve Chandra Savale).

With obvious parallels to contemporary global events, ADF were commissioned by the Festival to create a second synthesis of music and film inspired by recent events in Iraq - this will be the world premiere.

Their searing junglist beats, indo-dub bass lines and funked-out guitars seem the perfect complement to the hard-hitting pulse of the film and they will fuse their usual sounds and some North African twangs with elements of the original score for the live performance.

"You have to make sure that you respect the tempo of the scene and the action of the scene," Chandrasonic says.

"You have to find the rhythm and let the film guide you."

Saturday May 1, 5.30pm & 9.30pm, £16, 01273 709709