Having a list of n FM frequencies that may be
tunable, we must now split the work into n parallel
tasks, one for each station. The full 20.2MHz
wide time domain signal will be wired to the top of
each of these parallel processes, at which point a
bandpass filter will attenuate all but the particular
station’s frequency content. These bandpass filters
should have a width of 250kHz centered at one of
the detected frequencies. The pre-calculated
coefficients for tuning all 200 FM stations would
require a relatively small amount of memory and
could be stored in a lookup table. Each detected
frequency from the FFT would link the
appropriate coefficients to each parallel task.