Actually, since (As I remember the factoid I encountered somewhere, somewhen) the static we hear on radios is actually the background radiation of distant stars, it would make sense that space-traveling aliens from some unknown planet would find that more musical than culturally specific human creations.
Just your thought for the day.
BTW, Tuesday, November 10th is the anniversary of Sesame Street's debut episode, and is also the start of its 40th Season