Create A Custom Soundtrack To Go With Instagram pics. The color of the photo influences the tempo. more red = slower music, while more yellow = faster music. A photo’s brightness controls the arrangement of the music, so pics that are brighter on the left will have more sounds at the start, and brightness across the photo influences the complexity of the music. no faces = instrumental music, multiple faces = vocal harmonies, and an image with three or more faces = choir of vocals.