Define normalization levels in mp3s (album-specifically)

normalize-audio

#!/bin/bash
# Define normalization levels in mp3s (album-specifically)

audio_dir=~/Audio                       # Audio directory
sub_dir_inc=(Audiobooks Music Podcasts) # Sub-directories good to keep seperate

cd "$audio_dir"
for d in "${sub_dir_inc[@]}"; do
  # -a keep gain even relative to albums, -k lower to not clip, -T modify orgin
  # -d adjust volume by decibel amount (volume low on PSP)
  find "$d" -name "*.mp3" -exec mp3gain -a -k -T -d 4 "{}" \;
done