While Apple’s presentation software Keynote is vastly superior to Powerpoint one of the main limitations of using Keynote (at least for me) has been the fact that the control for sounds embedded in the presentation is quite limited (e.g. if I want to pause or stop a song or interview excerpt during the presentation). The solution is easy (but strangely implemented) and is explained by Macworld’s Rob Griffiths in his article “Control audio playback in Keynote presentations“.