Audio spectrogram generator

Requirements

• numpy
• scipy
• matplotlib
• ffmpeg binary
• ffprobe binary

Usage

Run ./spectrogram input_audio_file out.png.

Optional arguments

--start	Start second
--length	Length of audio
--window	Window function
--colormap	Color map (from matplotlib)
--grid	Generate grid
--scale	Generate scale
--colorbar	Generate collor bar
--linear	Linear y scale
--image_width	Generated image width
--image_height	Generated image height
--gain_min	Minimal gain (default -100dB)
--gain_max	Maximal gain (default -30dB)
--frequency_min
	Minimal frequency
--frequency_max
	Maximal frequency
--step_size	Number of samples per step

Examples

./spectrogram audio.wav out.png

./spectrogram audio.wav out.png --scale --grid --colorbar

./spectrogram audio.wav out.png --linear --scale --colormap jet

./spectrogram audio.wav out.png --grid --scale --colorbar --colormap nipy_spectral --gain_min -80 --gain_max -20 --step_size 256 --frequency_min 100 --frequency_max 10000