Choose a Speed and Sound for the Slide Transition
OpenOffice Impress slide transition speeds vary from slow to medium to fast. Most slide show presentations use slow to medium as the transition speed. Medium speed is the default setting.
Sounds can also be applied to the transitions, such as explosion, lasers and applause. Apply them to all slides, or to specific slides.
A Note of Caution - Use sounds only if they are applicable to the presentation, to make a point. Don't distract your audience with lots of noise.