Hey,
      just wanted to let everyone know about a little trick I figured out today.  If you're writing for an indoor percussion ensemble(or any indoor kind of performance), turn the reverb on all your instruments up to 100% and you will get a more authentic sound of being in a gym.  Please let me know your oppinions on this. It may have just been that I was too stupid to know what reverb was.

Cool. If you have limited resources, be careful with reverb as it places much more strain on your CPU. If you're having good performance though, great!