Improve Audio Quality

I need assistance with improving the quality of an audio file that is too scratchy to hear. The file format is not one of the common types like MP3, WAV, or AAC. The main issue is significant background noise that makes the audio difficult to understand.

Key Requirements:
- Identify and reduce the background noise in the audio file.
- Ensure the audio is clear and comprehensible after processing.

Ideal Skills and Experience:
- Experience in audio editing and noise reduction.
- Proficiency with audio editing software capable of handling various file formats.
- Attention to detail in enhancing audio clarity while preserving the original content.
Subtitles is you can