Preload audio?

Is it possible to preload audio and graphics so that a user can then move through the slides without a lag?

I don't mind if we have to provide a preloader slide - at least the user is made aware to wait a few minutes at the start of the module, rather than having to wait at every slide.

I understand Storyline preloads assets for the next 3 slides but if a user is moving faster than the rate at which the assets are being downloading, there is a delay in showing the next slide.