A set of tools for computing waterfall spectrograms from an audio recording.
A simple console program which turns an existing audio file into a spectrum image.
A simple program which records an audio signal from a microphone and computes a spectrum image in realtime. [Space] = Start recording, [S] = Save the recording, [R] = Clear recording
Installation with make.
libsndfile http://www.mega-nerd.com/libsndfile/
SDL2 SDL2_image SDL2_ttf https://www.libsdl.org/
OpenSans is under Apache License 2.0. https://www.opensans.com/
FFT4G http://www.kurims.kyoto-u.ac.jp/~ooura/fft.html
Tamás Korodi