 Electronic conditioning of the instrument leaves the topology and primary acoustic features unaltered, but increases the scope of the vibrational criteria and control.This made it possible to distinguish the different pitches of various modes, to obtain the emission of long notes, which could be modulated as those emitted by a stretched string, and to adapt the acoustic energy independently of the emitted frequencies.To maintain agile execution and adequate reproducibility of the phenomena, the first classification of sounds and performance techniques was limited to the use of fingers, hands and arms (Fig.