I can edit audio files and do things like:
Cut out mistakes, unwanted parts, breaths/coughs, repeats, glitches, etc. (you specify the points where you want the edits made).
Change bit rate or file format (I'll provide you with a 320 kbps MP3, WAV, AIFF or other).
Break files up into smaller files or take smaller files and combine them into one large file.
Add music provided by you (or from my collection of Youtube-approved royalty free music).
Add/mix in background sounds.
Mix songs together.
Reduce backrground noise.
Loop, repeat, reverse audio.
Add sound effects like delay/reverb.
Normalize audio so you have consistent volume levels