Bass issues after converting to audio fill

[baldour77]

I am new to this and this is my first try working with audio files, but got a hang of it fast. However, I have a problem. I got 5 copies of a song being sung by 5 different people, and i am merging them together to have all 5 sing at once. While i play the song in the program it sounds great!, However, after i try to make it either an .mp3 or .wma file, it sounds good, but then once the bass hits it becomes to much for the file and all i get is static. I fixed the small problems with the bass somehow, but the main bass part is still to much.

 

Is there anyway to fix the bass using the program? I have tried to set the settings for the best quality after converting but yet nothing.