Using libsndfile, ncurses, alsa-libs and of course fftw3 library, one can write a 200-liner console program in C that performs spectral analysis of a sound file while playing it. This is of course limited to audio files supported by libsndfile, which is currently wav and ogg. But nothing prevents people to do lame -d or use a similar decoder and pipe the resulting wave to the program.
What I am talking about? Look:
https://github.com/jirislaby/collected_sources/tree/master/snd_fft
1 comment:
Your code is very useful and it helped me to understand some things, thanks!^_^
Just can you explain, why do you divide holder->samples[a] on channels in compute_avg()?
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