Pilot tracking module operable to adjust interpolator sample timing within a handheld audio system

A pilot tracking module operable to produce a feedback signal used to adjust an input signal, comprising:

• a mixer, operable to mix an the input signal containing a timing component with a reference signal;
• a filter operably coupled to the mixer, wherein the filter is operable to filter a timing error signal from an output of the mixer;
• a comparator operably coupled to the filter, wherein the comparator is operable to compare the timing error signal with a null signal and produce an offset signal;
• a loop filter operably coupled to the comparator, wherein the loop filter processes the offset signal to produce a filtered offset;
• and wherein the loop filter further comprises:
• a first gain module;
• a second gain module, wherein the first and second gain modules receive an output of the comparator;
• an integrator operably coupled to the second gain module, wherein the integrator receives an output of the second gain module;
• a first summing module, operably coupled to the first gain module and integrator, and wherein the first summing module is operable to sum an output of the first gain module and an output of the integrator;
• and
• a second summing module operably coupled to the first summing module, wherein the second summing module sums an output of the first gain module and a level signal, and wherein the second summing module normalizes an output of the loop filter for the quantizer;
• and
• a quantizer operably coupled to the loop filter, wherein the quantizer receives and processes the filtered offset to produce the feedback signal used to adjust the input signal.