Of course it's unsafe. BTW, so is looking at your phone mounted on your handlebars, but that's a different thread.
In any case (speaking as a musician), isn't there are already too much "music" around you already? Supermarkets, home, muzak... you name it.
Enjoy the sound of reality, stay safe, and if you need it, hum or sing to yourself. You have a huge number of "music files" in your head already -- use them.