For the deer to hear your stereo as you are approaching, you would need it to be SO loud that it would do damage to your ear if you are inside the vehicle where it is being played. Even if you had a convertible. By the time you get close enough for the deer to hear the sound of your stereo, it already sees and hears your car coming. If anything, it would have the opposite intended effect anyways, confusing them and producing the deer in the headlights effect.
Go to walmart or a parts store, and pick up those deer warnings, they aint perfect, but they kinda work a little bit. Other than that, just do like I do, drive carefully and keep an eye out.