An added thought.
Sometimes during my meditations involving music, I pick up mental thoughts from aliens that are heterodyned into the music wave. In the movie "Close Incounters Of The Third Kind", they started that official communication with a certain melody, followed by established music patterns in mathematical scales; then classical overtures.
It seems to me that advanced races are more musically inclined than we are and actually use it for communication as well as entertainment. Not only that, but color coordination with music in a not so psychedelic a manner may offer methods they utilize as well for conveying ideas and concepts.
Ralph