A single white line quivers across a field of pure black, swelling into a dense thicket of oscillations before slackening again at either edge. It is a waveform, the kind of trace a radio signal leaves on a screen, and it is almost all there is.

Look longer at the tallest peaks bunched in the middle and the shape stops being noise. The crests thicken and resolve into two letters, A and M, the album's own title smuggled into the very thing that carries sound. What reads at a glance as a bare technical diagram is hiding its name in plain sight.

The design for Arctic Monkeys' fifth album gives you almost nothing and asks you to keep staring. That refusal to decorate, and the small trick buried in the wave, is what has made the image stick, and it raises the obvious question of what all that black space is actually doing.