CD wave diffraction

So I was driving in my car listening to my CD when I realized that I had been taking waves for granted. Sound waves were being amplified by the speakers and reaching my ears. When I would change the balance and tilt of the car, different speakers changed their amplification in order to make the sound loudest at a specific point in the car. I also realized that a CD works by means of light diffraction. A laser is shown beneath the CD and reflected off of the CD back into a laser reader. The bottom of the CD contains grooves that cause the laser to be deflected back at different lengths. The constructive and destructive interferences allow the CD reader to process the light waves into sound waves.