TedEH
Cromulent
If there's any very quick and easy tidbit to take from this thread, it should be the point that sound is additive.It must be something I'm doing when I put them in a bus together that is causing them to clip.
If you record something to a track, duplicate that track, then bus those two together, the result will add together both copies and peak 2x as high as the originals on their own. (That math isn't as clean when the signals aren't exactly the same, but the same principle mostly applies: Bus'd tracks will generally peak higher than the individual tracks that contribute to it.)
So what does this mean practically? Turn your bus tracks down.
If you think of your track structure as a tree, I usually have the lowest level "leaf" or "source" tracks sit at 0, and the master stays at 0, but pretty much everything in between is reduced significantly.