It is rare for the audience to be offered ears plugs upon entering a gig.

After all, you don't wear sunglasses to get the most from a firework display.

James Ginzburg and Paul Purgas with their production project Emptyset created an extraordinary range of both very high and very low frequencies at volume levels that made the Dome studio doors rattle and the soles of your feet tingle.

The ears plugs were a considerate gesture. Emptyset attempted to create as much as possible by using as little as they could. It was a minimalist philosophy that Stockhausen would applaud.

This performance was about the development rather than the repetition of an idea. Their black and white projected images were created by the physical properties of the sounds and left only a few familiar hooks for the audience to hang on to - the occasional bassy pulse being an obvious example.

Noise or music? A deeper concentration was required to stay in the moment with both your ears and eyes, for Emptyset's pyrotechnics were serious and studied.

At the end of the 60-minute set perceptions were heightened but without disorientation.

A memorable exploration of cellular composition and sound, the experience had been compelling.