Karlheinz Stockhausen has done rather well out of this weekend’s instalment of Southbank Centre’s The Rest is Noise festival, with his music featuring in all three of the concerts as well as the mouthwatering additional event “Breakfast with Stockhausen”. Perhaps because of his countercultural leanings and his reputation as an eccentric rather than an academician, public appetite for this composer seems a touch greater than that for contemporaries of his such as Pierre Boulez and Luigi Nono. And a further, undoubted reason why a programme of Stockhausen can pack the Royal Festival Hall this effectively is his eye for the spectacular: his three-orchestras-big magnum opus Gruppen (1955–57) is nothing if not an amazing event to witness. This performance, with a hugely swollen London Sinfonietta supplemented by players from the Royal Academy of Music Manson Ensemble, was yet more excellent advocacy for this difficult music, and it made the best of impressions aurally as well as visually.
While conductor Martyn Brabbins’ Orchestra 2 had the luxury of the hall’s stage to itself, Baldur Brönnimann and his Orchestra 1 were crammed into the boxes to the left of the stage, and Geoffrey Paterson and his Orchestra 3 occupied the same space on the right. The idea of the music surrounding its audience is crucial to Gruppen, and fortunately, this terrifying stereo effect was discernible even from a seat such as mine, a little back from all the orchestras. Sounds bounce around the hall in Gruppen, from orchestra to orchestra; they swell and shrink, refract, change, vanish. Trying to follow what’s going on would be insane. It is a world to get lost in for 25 minutes, and like any effective labyrinth it seems totally different each time you enter it: they played it twice this evening, and the two performances, immaculate though they were, both seemed very different.