walk directory tree and convert any audio files (mp3, aif, aiff, flac, caf, m4a, etc.) to wav format @ 44.1Khz 24bit audio

audoconversionwalktree.sh

#!/bin/bash

# EXAMPLE OPTIONS
#ffmpeg -i $file -ar 44.1k -ab 320k "${file%.mp3}.wav" && rm "$file"
#sox $file -b 24 -r 44100 -c 2 "${file%.mp3}.wav" norm && rm "$file"

function rmspaces {
    local dir=$1 
    for file in "$dir"/*; do 
        [ -f "$file" ] && ( mv "$file" "$(echo $file | sed -e 's/ /_/g')" ) 
    done
}

function iscaf {
    local file="$1"
    if [ -f $file ]; then
        if [ "${file##*.}" = "caf" ]; then 
            echo "[$file] FOUND AN CAF"; 
            sox $file -b 24 -r 44100 -c 2 "${file%.caf}.wav" norm && rm "$file"
        fi
    fi 
}

function ismp3 {
    local file="$1"
    if [ -f $file ]; then
        if [ "${file##*.}" = "mp3" ]; then 
            echo "[$file] FOUND AN MP3"; 
            sox $file -b 24 -r 44100 -c 2 "${file%.mp3}.wav" norm && rm "$file"
        fi
    fi 
}

function isaif {
    local file=$1
    if [ -f $file ]; then
        if [ "${file##*.}" = "aif" ]; then 
            echo "[$file] FOUND AN AIF"; 
             sox $file -b 24 -r 44100 -c 2 "${file%.aif}.wav" norm && rm "$file"
        fi
    fi 
}

function isaiff {
    local file=$1
    if [ -f $file ]; then
        if [ "${file##*.}" = "aiff" ]; then 
            echo "[$file] FOUND AN AIFF"; 
             sox $file -b 24 -r 44100 -c 2 "${file%.aiff}.wav" norm && rm "$file"
        fi  
    fi  
}

function ismp4 {
    local file=$1
    if [ -f $file ]; then
        if [ "${file##*.}" = "mp4" ]; then 
            echo "[$file] FOUND AN MP4"; 
            sox $file -b 24 -r 44100 -c 2 "${file%.mp4}.wav" norm && rm "$file"
        fi
    fi 
}

function ism4a {
    local file=$1
    if [ -f $file ]; then
        if [ "${file##*.}" = "m4a" ]; then 
            echo "[$file] FOUND AN M4A"; 
            sox $file -b 24 -r 44100 -c 2 "${file%.m4a}.wav" norm && rm "$file"
        fi
    fi 
}

function ismov {
    local file=$1
    if [ -f $file ]; then
        if [ "${file##*.}" = "mov" ]; then 
            echo "[$file] FOUND AN MOV"; 
            sox $file -b 24 -r 44100 -c 2 "${file%.mov}.wav" norm && rm "$file"
        fi
    fi 
}

function isflac {
    local file=$1
    if [ -f $file ]; then
        if [ "${file##*.}" = "flac" ]; then 
            echo "[$file] FOUND AN FLAC"; 
            sox $file -b 24 -r 44100 -c 2 "${file%.flac}.wav" norm && rm "$file"
        fi
    fi 
}

function walk_tree {
      local dir="$1"
      local i
      for i in "$dir"/*; do
        if [ "$i" = . -o "$i" = .. ]; then 
            continue
        elif [ -d "$i" ]; then  # FOUND DIR, PROCESS DIR AND/OR WALK-DOWN INTO DIR...
            echo "[cdir]:: $i"
            walk_tree "$i"      # RECURSIVLY CALL ONESELF AND DECEND INTO NEXT LEVEL
        elif [ -f "$i" ]; then
            rmspaces $dir
            iscaf $i
            ismp3 $i
            isaif $i
            isaiff $i
            ismp4 $i
            isflac $i
            ism4a $i
            ismov $i
            echo "[file]:: $i"  # HANDLE PARTICULAR FILE 
        else
            echo "[desc]:: $i"  # DESCEND INTO NEXT DIRECTORY; ELSE SOMETHING IS WRONG
            continue
        fi
      done
}
walk_tree $1