The sound waves are so low that you can hardly hear them, you rather feel them as physical vibrations. To low to be called an acoustic phenomenon, let alone music - but this changes after the first few minutes: in the completely blacked-out room, hearing itself is staged and becomes the protagonist. Later, strange ambient noises pile up to form solid, impenetrable walls of sound, as a result of which silence seems paradoxically to come into its own right again. The (sub)sonic world of Francisco López, who has been working on his individual acoustic language for more than 25 years and publishing his music on more than 140 labels around the globe, offers psychoacoustic weightlessness instead of clues.