Audio Clarity Enhancement for Radio

I need an audio editing expert to enhance the clarity of voices in a radio audio file. The original file is in AAC format.

Key Requirements:
- Improve voice clarity, as they sound too far away.
- Maintain the quality of the original audio.
- Deliver the edited audio in the same AAC format.

Ideal Skills and Experience:
- Proficiency in audio editing software
- Experience with AAC audio files
- Strong attention to detail and sound quality

Please provide samples of previous similar work.