An electronic instrument comprising an elongated member, comprising a plurality of detectors aligned in the elongated member, each detector for detecting a finger-sized object in the vicinity thereof and for providing a corresponding signal; a processing unit operatively connected to the plurality of detectors, the processing unit for receiving the signals from the plurality of detectors and for generating a signal indicative of a sound to generate and a sound generating unit operatively connected to the processing unit, the sound generating unit for receiving the signal indicative of a sound to generate and for generating a sound accordingly and wherein the processing unit and the sound generating unit are located inside the elongated member.