The cello is everywhere at this year’s Roskilde Festival. Some use it as just about anything else – hey, now it’s an electric bass, or how about a keyboard drowned in effects – but in American Jasper Marsalis’ Marcela Lucatelli-worthy bomb project Slauson Malone 1, the cello was actually used as, well, a cello.

Marsalis himself handled vocals and electric guitar on the open Platform stage, while Nicholas Wetherell opened the concert with a motor-race assault on his amplified cello, then pivoted into plucked meditations, to which Marsalis contributed overtone playing on guitar. Sensitive jazz guys? Nope – suddenly: synchronized noise sprints, intimacy splintered, and before long Marsalis threw himself into the seated audience with a somersault – and a scream.

Meanwhile, Wetherell played tender vibratos. Because contrasts thrive at Roskilde – and, after all, seem to be driving the world forward these days. And so it was the world itself that came into focus in the music: through violent shifts between 8-bit Smurf vocals, ambient gnawing solo cello, intimate indie layered over a one-second sample of Cher – culminating in a wistful lullaby veiled in digital theremin.

In many ways, it was peak hipster era. But it was also intensely moving – something like following Mahler out on the edge of the abyss as he tried to sketch the whole world into his scores. The only difference: the easel looks a bit different today.