We just discovered that using multi-channel-audio in your PowerPoint-games, not-only makes their worlds sound more convincing, but even though it takes a bit more work to set-up, it also improves the performance of your engine when in Slide-Show-mode! Sounds play much faster than that SNES-esque audio-ram-rate that happens on PPT's main-audio-channel that it uses for transition- and animation-sounds!

To enable multi-channel-audio, you'll need buffer-slides before every slide that uses it; to ensure that all hyperlinks lead to your buffers instead of the actual audio-hosting slides; to insert each sound-effect as its own audio-file using the Insert-menu; to make sure its playback happens With- or After-Previous with the respective delays, when applicable; and to ensure that every sound-effect plays for 999 slides, so that it doesn't lock-up the rest of the animation-rig until it's done-playing.