1. A method, comprising: selecting a primary media item for playback on an electronic device; selecting a secondary media item for playback on the electronic device; and ducking the primary media item by a ducking value while the second media item is played based upon a desired relative loudness difference, such that the relative loudness difference is substantially maintained and such that the primary media item is played at a ducked loudness level during an interval of concurrent playback in which the primary and secondary media items are both played back simultaneously on the electronic device.