The Music Energy Level is a way to alter the overall intensity and kinetic energy within the music stream for a given channel. Immediately under the channel name, you'll see three options. They are different across the channels, but they all mean the same things - low, medium, and high energy. Most of our members have found that at different times in the day, they require a bit more or a bit less energy in the music. For example, right after lunch, a person may need more energy so as not to feel sleepy after eating. While mid-morning may require lower intensity to sustain focus.
Feel free to experiment with it to find what works best for you!