Year of composition
MUF is the acronym of Maximum usable frequency. In radio transmission maximum usable frequency (MUF) is the highest radio frequency that can be used for transmission between two points via reflection from the ionosphere (skywave or “skip” propagation) at a specified time, independent of transmitter power. Under this idea the sounds of the piece are described, which is always constructed from sounds that go from one point to another. It can be interpreted with visuals made by Damià Jordà for it. The piece combines moving sound and pulses, always giving the impression of the curvature of the ionosphere, and the reflection of sound frequencies and the electrical charge that occurs in this place due to the ions.