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sndfile2fft

This is a simple application I hacked together while testing USB Audio Interfaces.

It takes a wav file, runs an FFT (using FFTW), plots the output (using gnuplot), just some simple checks for glitches (expects sine waves)

Requirements

Building

Something like the following should do it..

gcc -lfftw3 sndfile2fft.c -lsndfile -std=gnu99 -o sndfile2fft

(A simple makefile is included)

Usage

sndfile2fft [-p]

Where the output file will contain a line for each freq bin. First column freq value, then column for each channel.

Adding the optional -p on the end will cause it to draw a plot with gnuplot.

Testing

Only tested on OSX and a few recorded wav files (some with injected errors).

TODO

  • Only for stereo really
  • Could do with command line options for the various options
  • Needs tidy up - Very hacky!
  • Check detected peaks dont move

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Take a wav file an generates fft data

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