Provided is a string tuning mechanism that enables a musician to clamp and anchor a musical instrument string to a musical instrument tuning peg. The memory cells are two-dimensionally arranged in the row direction and in the column direction. In one embodiment, markers may be inserted into the data transmission flow and a method may be utilized to associate a handle with a particular marker. Thus, when a communication terminal apparatus incorporates therein other functions than an audio reproducing function, operation of such function can be limited properly. The integral display can also be used to aid headsetsystem configuration. The serialization module then generates new serialization data from existing connectionposition data.