Steve Reich turns 90 on 3 October, and the Southbank Centre marked the occasion with a Reich-fest that managed to sidestep the usual birthday-concert problem: the music feeling like a monument instead of a living thing. Two performances on the same evening made the case that Reich's work belongs less in concert halls than in rooms where it can do what it was always designed to do — reorganise the listener's nervous system. The evening opened in the Clore Ballroom with Paraorchestra, Charles Hazlewood's collective of disabled and non-disabled musicians, performing Music for 18 Musicians. This is the right venue for the right piece. The immersive staging scattered musicians across podiums throughout the space, and the audience was free to wander — peering at marimba players as if inspecting sculptures, or getting pulled into the central mosh pit by five dancers who had clearly been briefed to extract movement from people who didn't know they wanted to move. Line dancing, disco lights, grandparents finding their groove alongside children. This is Reich's half-century-old piece behaving exactly as he likely intended: as social technology. Paraorchestra brought ironclad discipline to music that can drift into pleasantly ambient mush in less committed hands. The polyrhythmic interlocking parts demand the kind of ensemble precision that makes jazz players anxious — every phase shift earned, no room for approximation. The collective grins in the room were not manufactured by the staging; they were a physiological response to the music working as advertised. Upstairs to the Royal Festival Hall, and the formal atmosphere shifted the register. The London Sinfonietta with conductor Chloe Rooke and guitarist Jonny Greenwood is a different proposition — more controlled, less porous. Pulse (2015), one of Reich's more relaxed later works, spun canonic wind and string melodies over piano-led ostinatos with crisp execution, if less heat than the Clore Ballroom had generated. Greenwood's presence as electric bass player provided a neat connective tissue to Radio Rewrite (a 2013 Sinfonietta commission), in which Reich takes two Radiohead songs — loosely, affectionately, without apology — and folds them into his own vocabulary. The second half was the sharper half. Greenwood's clean technique and genuine personality brought something to Electric Counterpoint that the score doesn't always get: a sense of somebody actually present in the music, not just executing it. The live guitar against his own pre-recorded backing track is a neat piece of theatre, and Greenwood played it with enough individuality to make the pre-recorded version sound like a different musician. City Life closed the evening with sampling keyboards importing car horns, door slams, heartbeats, and police sirens into the orchestral texture — Reich's love letter to New York that also happens to be a structural argument about what counts as musical material. What the evening demonstrated collectively is that Reich's longevity is not nostalgia-proof but process-proof. The music survives because the mechanism — phase shifting, additive process, the human ear's tendency to extract melody from repetition — is not period-specific. Paraorchestra understood this better than the Festival Hall half did; the immersive staging didn't dress the music up, it simply removed the obstacles between the mechanism and the listener's body. That's worth noting as Reich turns 90: the work doesn't need protecting. It needs performing.
