Music for relaxation

What exactly is “relaxing” music? Whether we are aware of it or not, music that's relaxing tends to slow down our heart rates to about one beat per second. If we're feeling stressful, angry, anxious, or irritable, our heart rates tend to increase. Music can actually help our heart rates slow down to a more relaxing pace, changing our physiology. This phenomenon is what can help me fall asleep more easily. It's what is found with many meditation tapes or other music specifically designed for stress reduction or relaxation.