I will do audio edit, cleanup and fix sound in audio

Yes, Most audios are easy to remove Background noise, in rare cases, it's good to leave little noise to avoid any vocal damage.

Upload your file on google drive or dropbox and then send me the link.

Very low-quality audio can't be edited perfectly. Using industry-standard tools to make it sound better than before but you can't expect it to be sound studio level.

Sure, Please reach out to me with further details like how many audios are there and the total duration.

It is possible to remove the echo. But after applying extreme filters, we will lose the vocal quality. It is better to treat it until it stops serving as a distraction.

You can send me any known audio format, but I will recommend .wav or high-quality mp3 for better results.