Hi,
As you can see from my profile and portfolio I have professionally worked in audio for the last 32 years. I spend every day looking at music backgrounds and fixing whatever needs fixing for worldwide artists.
I am more than happy to have a listen to your audio file and make recommendations, also do any simple fixes myself as part of the job, if there are more complicated requests like mixing or mastering then additional fees will need to be paid.
Many thanks and let me know,
Ian