Hey there!
I see that you're looking to have your audio files cleaned up. I've been a music producer for about 8 years and I even produce for a big music label out of USA. What I can do for you is clean up your audio file (remove the background noise), remove the muddiness, make the audio file sound 'full' and bright. I can even make the audio file sound louder, but still keep the clarity!
If you're interested, feel free to contact me.
Thanks,
Josh