Directed by Vincent Morriset. Featuring Sigur Rós Club, IFI Dublin (Fri/Sat); QFT, Belfast (Sat), 75 min

AT A TIME when the concert film has become increasingly wed to 3D verisimilitude, Vincent Morriset's Sigur Rós documentary strikes a pleasingly discordant sound. Shot in 16mm monochrome from behind prisms and obscuring objects, Inni's defiantly lo-fi visuals are matched by the spar-like purity of the band's performance.

Nobody shouted "Hello, Cleveland" during Heima,the 2007 tour documentary, but it did offer a peek into the clockwork of the ethereal Icelandic rockers.

Inni– the Icelandic for "inside" – is all the more intimate for its lack of explicit detail.

An unvarnished account of the quartet’s 2008 “farewell” gig at London’s Alexandra Palace interspersed with archival annotations, the film marks a return to the fray for Sigur Rós, who seemed to disappear not long after their music became a default for TV sports spots and dinner parties.

Morriset’s chronicle is, as they say, unlikely to win new converts, but his murky visuals provide perfect compliment to a strange burial ritual.

Vocalist "Jónsi" Birgisson rarely raises his head for nine tracks, which cover all of the studio albums. It's been a long wait for fans, but rebirth is assured by the appearance of new track lúppulagiðand Inni's multimedia DVD and double CD release next week.