Ronin at Ronnie’s

Somewhere between an “oh!” and an “ow!”, the abrupt vocal command with which Nik Bärtsch cues his musicians for a shift in musical pattern is the polite zen-funk equivalent of James Brown’s exhortation to take it to the bridge. The reaction is immediate, the players switching from one polyrhythmic cell to another in perfect unison, reframing not just the abstract geometry of metre and tempo but the weight, tone and landscape of the music.

If you own any of the Swiss pianist-composer’s albums, on ECM or his own Ronin Rhythm label, you’ll know that his pieces all go under the bland title “Modul”: “Modul 17”, “Modul 44”, “Modul 55” and so on. I find it rather refreshing not to be primed to think about whether or not a particular piece is a successful portrayal of a nightingale singing in Soho Square. You can just get on and listen to the notes, free from baggage.

But although it may be programmed, there is nothing cold about it. Bärtsch’s music is sometimes attached to such categories and minimalism and systems music, but it’s too abundant to qualify for the former and too warm-blooded for the latter. Any superficial impression of austerity is profoundly misleading. To hear one of his bands live is to share an audience involvement that expresses itself at the end of each long and intense set in a roar of pure exhilaration.

That’s what happened when Bärtsch returned to Ronnie Scott’s Club last week with Ronin, currently a quartet with Jeremias Keller, a relative newcomer on bass guitar, joining the stalwarts Kaspar Rast on drums and Sha on bass clarinet and alto saxophone. Ronin was assembled in 2001 and plays every Monday night at Exil, Bärtsch’s club in Zurich, its members applying their virtuosity to perfecting what their leader calls “ritual groove music”.

I’ve heard Bärtsch’s music in several environments: with Ronin in churches in London and Bremen, solo (with a light artist) at the Barbican, with a horn section at Kings Place and with the Frankfurt Radio big band, orchestated by Jim McNeely, in Berlin. In the set I heard at Ronnie’s, they played the six pieces from their latest ECM album, Awase, blended together into two long sequences, plus an encore. Compared to those earlier performances, this sounded mellower, less edge-of-the-seat, a little more lyrical and reflective, particularly in something like the swooning chordal descent of one section of “Modul 36”.

Even in its gentler moments, however, it was still imbued with that characteristic sense of coiling and uncoiling while still held in tension. And the quality of the playing of all four was extraordinary, with Bärtsch delving into the grand piano’s innards to pluck, strum and damp strings, occasionally striking its frame with a stick, the devoted Sha in the role of Jimmy Lyons to his Cecil Taylor, Rast tireless in nailing down the complex metres and displaced beats, and Keller’s alertness and agility fitting in so well that he might have been with them since the beginning rather than a mere three years.

It was great to see a big crowd assembled to hear this music. Of course the majority of the audience knew exactly what they had come for and received their reward. But also it was interesting to watch the more casual type of customer, the sort who basically turn up for a night at a famous jazz club, as their initial scepticism turned to curiosity and then to intrigue and ultimately to delight, shared with the rest of us.