— by https://youtu.be/TYF5ytMDFpA
- Audacity
 - Audio File
 
- Open the file
 - REMOVE BG NOISE — Use empty track on start of recodring then click drag & select then > Effects > Noise Reduction > Take Sample > Slect Entire track > Effects > Repeat Noise Reduction
 - COMPRESS — Effects > Compress > Threshold -18
 - BASS BOOST — Effects > Equilization > Bass Boost
 - TREBLE BOOST — Effects > Equilization > Bass Boost
 - PEAK/HARD LIMITER — Effects > AUPeakLimiter or Hard Limiter or Peak Limiter
 - NORMALIZE — Effects > Normalize