Maybe in a wrap up you could show a chart with one column showing resources used when the player is playing a song while the window is maximized and another column showing resources used when the same player playing the same song is minimized (in the tray, dock, etc.).

I know a lot of people, including myself who do heavy graphic oriented work want to listen to music at the same time. The last thing I want is my media player slowing down my photoshop or 3d modeler. Knowing resources would be very helpful. Thanks!