A delayed lock loop circuit includes: a phase conversion control unit configured to latch an initial value of a phase comparison signal, and output the latched signal as a phase conversion control signal. A dichroic reflector transmits the longer wavelength light, and reflects some LED light onto the phosphor such that as light travels from the LED to the dichroic reflector it does not pass through the phosphor. The present invention further comprises a chemical impairment detection sampling device in operable communication with and responsive to the video surveillance system, the sampling device adapted to receive a chemical impairment detection test sample from the tester. Performance related inventions of this guitar include; a specialized fixed tremolo bar which remains accessible to the instrumentalist’s fingertips at all times; a specialized tremolo lock for use with the aforementioned tremolo bar; and a guitar pick holder designed for convenient and unobtrusive placement.