Methods and apparatus for the active control of a wavelength-swept light source used to interrogate optical elements having characteristic wavelengths distributed across a wavelength range are provided. Musical tones generated from a musical instrument are detected, and tone data is stored in a storage device, and the tone data stored in the storage device is reproduced and at least one tone corresponding to the tone data is egenrated when no next musical tone is detected within a predetermined period of time after a musical tone is detected. One region of the spiral is preferably fixed to an insulating housing, while another region of the spiral may be rotated for the tightening on the wire and then preferably latched to the housing so that the spiral remains in the tightened condition. The playitem indicates at least a portion of the first clip stream file to reproduce, and the sub-playitem indicates at least a portion of the second clip stream file to reproduce. In response, this interface returns a handle that corresponds to the submitted identifying data segment.