The new ETSI technology (Signal Anomaly Control) concerns the effective control of the signal from the magnetic microphone and the dual-coil magnet. The TAP company developed this technology specifically to meet the diverse needs of a modern musician who must be effective in various conditions of study, creation, recording, and performance.

The idea was based on the magnetic superposition of the field, related to the overlapping of the windings. THIS allows for immediate and continuous dual control of the signal produced by the musical instrument, through the strings and the interaction of the body.

The ETSI technique resulted in a comprehensive system that is user-friendly and flexible, highlighting the performance, the style of the soloist, and the uniqueness of the playing method.