Remove the sound from noise

I am looking for a freelancer who can remove the background noise from my M4a audio file and deliver a completely noise-free outcome and improve quality . The ideal candidate should have experience in audio editing and be able to efficiently remove background noise.

Skills and experience required:
- Audio editing
- Noise reduction tools and techniques
- Experience working with M4a format files

The project requires the following deliverables:
- A noise-free M4a audio file
- A report detailing the noise reduction process used

If you have the skills and experience required, please submit your proposal with a sample of your previous work. Thank you.