diff --git a/scripts/reencode_m4a.sh b/scripts/reencode_m4a.sh
new file mode 100755
index 0000000..1302f76
--- /dev/null
+++ b/scripts/reencode_m4a.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+for file in ./*.m4a; do
+   map='';
+   if [[ $# > 0 && $1 == 'map' ]]; then
+      map='-map 0:0';
+   fi
+   echo "ffmpeg -i '$file' -c:a copy $map -movflags +faststart '../reencode/$file'";
+   ffmpeg -i "$file" -c:a copy $map -movflags +faststart "../reencode/$file";
+done
diff --git a/scripts/reencode_mp3.sh b/scripts/reencode_mp3.sh
new file mode 100755
index 0000000..d82977b
--- /dev/null
+++ b/scripts/reencode_mp3.sh
@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+for file in ./*.mp3; do
+   echo "ffmpeg -i '$file' -c:a copy -map 0:0 '../reencode/$file'";
+   ffmpeg -i "$file" -c:a copy -map 0:0 "../reencode/$file";
+done
diff --git a/scripts/transcode_m4a.sh b/scripts/transcode_m4a.sh
index e8adb59..e095468 100755
--- a/scripts/transcode_m4a.sh
+++ b/scripts/transcode_m4a.sh
@@ -2,11 +2,11 @@
 set -euo pipefail
 
 for file in ./*.$1; do
-   map=''
-   if [[ $# > 1 && "$2" == 'map' ]]; then
-   	  map='-map 0:0'
+   map='';
+   if [[ $# > 1 && $2 == 'map' ]]; then
+   	  map='-map 0:0';
    fi
-   echo "ffmpeg -i '$file' -c:a libfdk_aac -profile:a aac_he -b:a 64k -movflags +faststart $map '../m4a/${file%$1}m4a'"
-   ffmpeg -i "$file" -c:a libfdk_aac -profile:a aac_he -b:a 64k -movflags +faststart $map "../m4a/${file%$1}m4a"
+   echo "ffmpeg -i '$file' -c:a libfdk_aac -profile:a aac_he -b:a 64k -movflags +faststart $map '../m4a/${file%$1}m4a'";
+   ffmpeg -i "$file" -c:a libfdk_aac -profile:a aac_he -b:a 64k -movflags +faststart $map "../m4a/${file%$1}m4a";
 done