Provided is a system and method for muting zero level pulse code modulated samples. In an embodiment, in-lining is done in conjunction with a 3-phase compiler including a front-end phase, an IPA phase, and a back-end phase. At least one of the tracks has a cross sectional profile which enables the wheels disposed in the one of the tracks to move out of the one of the tracks when the door is struck with sufficient force. The transducers can be employed in a line array as part of the loudspeaker system as well as some of the transducers facing forward while others rearward and, in doing so, their amplitudes and phases can be adjusted for fine tailoring the geometric coverage of acoustic energy radiating from the loudspeaker system. The LDD implants for low and high voltage transistors of the same conductivity type are allowed to enter the substrate, using the patterned polysilicon structure as a mask. The nano-sized diamond whisker can be used as a new field emission cold cathode device, thereby advancing a practical use of a field emission device having high performance, and can also be applied to various fields such as a new composite material and a mechanical device.