bfilt - Butterworth lowpass or highpass digital filter
by Andy Allinger, 2021, released to the public domain

    Permission  to  use, copy, modify, and distribute this software and
    its documentation  for  any  purpose  and  without  fee  is  hereby
    granted,  without any conditions or restrictions.  This software is
    provided "as is" without express or implied warranty.

address correspondence to:  andy@13olive.net
See the comments in the source code for usage instructions.
An article discussing the package is available at www.codeproject.com

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                              CONTENTS
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bfilt.c       Butterworth digital filter
bfilt.f

raw.c         Read and write raw audio data
raw.f

t_filt.c      Demonstrates low pass, high pass, and bandpass filters
t_filt.f

readme.txt    This file

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                        IMPORTANT DISCLAIMER
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  The software is intended for research and educational purposes.  While
no restrictions are placed on its use, there is ABSOLUTELY NO WARRANTY,
neither by the author nor by codeproject.com
  This software MUST NOT be used in applications where life or property
is at stake until the user has investigated whether it meets his needs.
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                         Revision History
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0   19 Sep 2021

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