This piece is composed as a trio, with two other French horns playing in the stereo electronic track, one in the left channel and another in the right channel. All sounds were recorded at EMS in Stockholm and are organized according to degrees of granularity, using as a starting point the geological cycles of erosion and sedimentation of stone. An exception is made for one sound: the kalimba tine embedded in the custom-built mouthpiece, a leftover from Interplay, which triggers a very short resonance in the horn. The resonance was recorded and its spectrum expanded in the tape, punctuating the non-pitched material along the composition.