RGB MusicLab converts RGB (Red, Green and Blue) value of an image to Chromatic scale music. The program reads the RGB value of pixels from the top left to the bottom right of an image. One pixel makes a harmony of three note of RGB value, and the length of note is decided by the brightness of the pixel. RGB value 120 or 121 is the center C, and RGB value 122 or 123 is added a half steps of the scale that is C#.