I recently came across old recording from the 1930's. Unfortunately not only is the quality low, it's a bunch of carpenters talking as they saw things and make all sorts of other noises.
- Various filters
- Audacity's native Noise Reducer
and yet no luck, I find that either what I'm doing is not working, or when I get the speech to sound louder than the tools the amplitude is too low to make out anything.
Is there any well defined technique for this?