Excellent Polish festival Unsound returns this year – and the theme is surprise.

Put simply, that means that there’s no full public line-up: some names will be announced in the lead-up to the festival, while others will remain a mystery until they take the stage. “How do our expectations affect the value we place on music as an art form?” asks the festival’s press release – arguing that the “unique atmosphere” of Unsound should prove just as important to the festival’s popularity as the line-up.

Of course, part of what makes this work is that Unsound has already gathered an audience’s trust by booking great line-ups, and in the build-up to Unsound 2015, FACT TV are running a series of films from last year’s festival. Following our look behind the scenes of Atom™ and Robin Fox’s Double Vision, we turn our attention to Ren ‘Container’ Schofield’s piece performance, where the noise-cum-techno artist collaborated with a pair of Norwegian drummers from the worlds of jazz and metal – Kenneth Kapstad and Tomas Järmyr – using contact mics, effects and triggers to transform them into “human drum machines”. Of course, as we found it, it wasn’t quite that simple.

Film by Kachna Baraniewicz