Neginah (the realm of music) is the highest level up in Shamayim.
Music has the power to influence in tremendous ways, either for good or for bad. Think of the way your body wants to move when you hear different types of music. Do you want to dance in a Jewish manner? Or do you feel like you want to dance wild and uncontrolled in a non-aidel way.
Does the music make you angry? Upset? Sad?
Think of your reaction and if it is an apporpriate way for a Jew to act. Then you will know if the root is decent or not.
Music holds incredibly strong power. We should NOT be listening to everything.