I'm building a five-minute promotional piece, and wonder about the best timeline architecture. There are about 20 animations, each of which having a sound clip that won't need word-by-word sync, but simply sync at the head of each of the 20 animations. Should I put each of the 20 animations in its own Scene, and use the onSoundComplete event in each Scene to proceed to the next Scene once the audio is done? Also, should I preload sound at any point??