Bash script to prepare samples for Expert sleepers Disting - Needs the following utilities : detox, ffmpeg and sox

prepare_disting.sh

#!/bin/bash
#
# Convert samples to 44.1kHz/16bit
# Remove all metadata from wav files in folders and create reversed wav files
# Needed : detox, sox and ffmpeg
#
# Usage:
# Put this script in a folder with your samples (they can be in subfolders), chmod +x
# and execute ./prepare_disting.sh
# All .wav files will be treated, detox will take care of spaces and such things
# Be aware that THIS SCRIPT MAKES NO BACKUP, so work on copies
#

# Do we have what we need ?
if ! [[ $(which sox) ]]; then
  echo "sox executable not found on system, exiting"
  exit 0
fi

if ! [[ $(which ffmpeg) ]]; then
  echo "ffmpeg executable not found on system, exiting"
  exit 0
fi

if ! [[ $(which detox) ]]; then
  echo "detox executable not found on system, exiting"
  exit 0
fi

# Use sox to convert samples to 16bit/44100Hz
# Original samples are deleted
convert_16b44khz () {
  filename="$1"
  sample_rate=$(sox --i -r $filename)
  sample_depth=$(sox --i -p $filename)
  if [[ "$sample_depth" != 16 || "$sample_rate" != 44100 ]]; then
    newname=${filename%.wav}_s.wav
    sox $filename -r 44100 -b 16 $newname
    rm $filename
    mv $newname $filename
    echo "Sample "$filename" converted to 16bit/44.1kHz"
  else
    echo "Not converting "$filename
  fi
}

# Use ffmpeg to remove metadata from samples
# Original samples are deleted
remove_metadata () {
  filename="$1"
  newname=${filename%.wav}_s.wav
  ffmpeg -hide_banner -loglevel warning -y -i $filename -map_metadata -1 -codec copy $newname
  rm $filename
  mv $newname $filename
  echo "Metadata removed from sample "$filename
}

# Use sox to reverse samples
# For each sample found a copy is created with "reversed" added to its name
# Eg: if the sample is named "cymbal.wav" then a reversed copy "cymbal.wav.reversed" is created
reverse_audio () {
  filename="$1"
  reversed=${filename}.reversed
  if [ ! -f "$reversed" ]
  then
    newname=${filename}.reversed.wav
    sox $filename $newname reverse
    mv $newname ${newname%.wav}

  else
    echo $reversed" already exists !"
  fi
}

export -f convert_16b44khz
export -f remove_metadata
export -f reverse_audio

detox -r *
find . -type f -name "*.wav" -exec bash -c 'convert_16b44khz "$0"' {} \;
find . -type f -name "*.wav" -exec bash -c 'remove_metadata "$0"' {} \;
find . -type f -name "*.wav" -exec bash -c 'reverse_audio "$0"' {} \;