Audio / mp3 file - cleanup

Hello. I have about 7-8 audio files (45-80 minutes/file) that I need to have cleaned up. These files are recordings of sermons I have spoken and contain little to no music. These files have a good amount of background noise that I need to have removed and the remaining audio restored/edited to optimal sound quality. I will be using these files on my website, so the quality of these files are a direct reflection on me. If I consider your bid, I will send you a raw 5 minute audio clip. I want to you to clean it up and send it back to me. This will show me the quality of work you are capable of and will help me make my final decision in hiring a freelancer for this project. I am looking for someone who has substantial experience with audio editing and audio cleanup. The end product will need to be in mp3 format. I'd prefer to have an American-based freelancer, but I will consider others. Since I have 7-8 files, I can package the project in a few ways: all eight in one bid, four with two different freelancers, or one file per freelancer. This will all depend on your price and the length of time in which you can complete the project. Please note: - Once assigned, I have no problem setting up a milestone payment for this project, but I will not release that payment until after the project is complete. If you ask me to do so before the project is complete, I will dismiss you from the project and hire another freelancer. - It is imperative you stay within the agreed time period provided in your bid. I will not tolerate late projects and will reflect any delays in your review as well as possible dismissal from the project. I look forward to hearing from you. Please contact me if you have any questions. Thanks!