lvecsey / envgd

Fill a pixel image with an audio envelope signal, for use with audio processing

Fill a 960x960 pixel grid with an envelope signal.

This program depends on the OS Mesa graphics library, for OpenGL line drawing.

     sudo apt-get install libosmesa6-dev

The syntax is color, then start time, end time, start signal strength, ending signal strength. The time goes from 0.0..1.0 and the signal strength is -1.0..1.0

WHITE, 0.0, 0.20, 0.50, 0.90
WHITE, 0.20, 0.80, 0.90, -0.30 
WHITE, 0.80, 1.0, -0.30, 0.40

Put that in a file called signal.dat

Then run:

make signal.png

To view the image:

feh --fullscreen signal.png

Also included is a gen_sindat which creates a sinusoidal wave.

make signal3.png
feh --fullscreen signal3.png