I think that Adobe Podcast might be one of the most helpful free audio tools I've come across in the last few years. Particularly for fixing badly recorded audio: too far from the mic, rustley, thin, it'll at least try to deal with it all. Have a go with the voice enhancer yourself! https://podcast.adobe.com/ Let me know what kind of results you come up with! 0:00 - Intro 1:02 - Interface demo 2:18 - Testing it out 7:46 - Pro version 10:26 - Conclusion 11:25 - My best attempts