this commit involves some major and perhaps braking changes
audio sorting is now done by a common function in fifo.c
all other input plugins send a s16le interleaved audio buffer here,
reformating might be done here in the future.
Audio is put in to three buffers of different lenght, shorter
buffers for higher frequencies. FFT is aplied separetly and
the ouput is combined toghether in the separate_freq_bans function.
This creates better responsivnes for higher frequencies while still
beeing able to pick up the lower ones.
karlstav
Chelovechishko