Ay this is some nice stuff as well. It sounds like you used LMMS to do this right? It sounds like the master channel wasn't passing 0 dB but the other channels may have been doing so. Like what i did with the superhero dance party was convert it to .wav and sample it using edison, then i passed this throught FL's mixer and on the master channel i simply reduced the volume and it sounds a bit less harsh...(like the saw waves)