A performer walks on a mountain trail carrying a loudspeaker on their back.
The loudspeaker plays back a series of both fixed and sweep tones.
The tones travel to the ears of the audience and get modulated by 1) the directionality of the loudspeaker; 2) the topography of the place; 3) the wind force; and 4) their distance from the loudspeaker.

The piece has been performed at the mountain festival Alture, Val Trompia, Brescia. A runner carried a loudspeaker from Malga Pontogna (1384 mt) to the top of the Gölem mountain (1957 mt). A series of long sine sweeps alternated with silences were played back. The piece was about 45 minutes.