Use ctune.exe from here: https://sourceforge.net/projects/ctune/

Example command line:

ctune exit wavespeed=0 d:\tmp\oow.flac minfreq=200 maxfreq=600 fpmaxpeaks=5 fpreconstruct=1 fpdebug=1 > fplog.txt

command line arguments used:

 exit               exits when complete
wavespeed=0         process at full speed instead of playback speed
 minfreq=200        ignore frequencies below this value
maxfreq=600         ignore frequencies above this value
fpmaxpeaks=5        keep only the 5 largest frequency peaks in each frame
fpreconstruct=1     build a new audio clip (out.wav) from the frequency peak data
fpdebug=1           dump the frequency peak data