Various techniques for controlling the playback of secondary audio data on an electronic device are provided. In one embodiment, a secondary audio clip mixing profile is selected based upon the type of audio output device, such as a speaker or a headset, coupled to the electronic device. The selected mixing profile may define respective digital gain values to be applied to a secondary audio stream at each digital audio level of the electronic device, and may be customized based upon one or more characteristics of the audio output device to substantially optimize audibility and user-perceived comfort. In this manner, the overall user listening experience may be improved.