Randomized the pitch eh!? I was just advised to do that yesterday during the last couple hours of my game by a friend for my explosions, but I ended up just going with different explosions sounds. I should have done the same with the "jump grunt" noise, but I was running out of time and really burnt out, lol.
Still haven't yet, I had a game breaking bug I forgot to tell you about on like level 3. I'm going to give it another go though.