The AK320 portable audio player picks up the design concept by Astell & Kern: light and shadow interact, with shadows only becoming visible where there is light. Accordingly, the asymmetric shape of the surfaces offers space for the variable interplay of light and shadow. This is complemented by refined design details like the pattern on the rear, reminiscent of a braided chain, or the lens-shaped riffle of the volume control, giving the audio player an independent identity.