Summary:
- Highlight Audio which you want to make it to sound good
- Effect > Noise Reduction (Remove background noise)
- Effect > Filter Curve > Manage > Factory Presets > repeat for these three things, and click OK after each thing: a) Bass Boost b) Treble Boost c) Low rolloff for Speech
- Effect > Compressor (leave the setitings & just press OK)
- Effect > Limiter > Set to Hard Limit > click OK
Other tips:
- it helps A LOT to have the mic close to mouth when recording
- Audio tracks in Audacity have 2 parts: top and bottom. If one part is completely flat (aka no sound), make the track MONOTONE. Do this by clicking Audio Track > Split Stereo to Mono > delete the flat part.