Don't even know if there's a solution for this in ppt....

I have a very long textbox of about 15 big paragraphs that need to continuously scroll up a slide, with an 8 minute .wav audio to go along with it.

I'm using the "fly-in" animation from bottom to top, because there is a box grouped onto the textbox.

I am having the roughest time trying to sync them. I animate them to both start at the same time, but the lengths of the paragraphs vary. So for example, at the 5th paragraph, it disappears before the audio for that paragraph is finished.

As far as I know you can only apply 1 speed to an animation, but there's gotta be another way, other than slowing down or speeding up the audio file, any ideas?