MST

I was looking for a simple and elegant way to convert a high amount of audio files from one format (.caf) to another (.aif). The solution i found is a very elegant one and also comes included with your operating system – if using a MAC.

afconvert -f AIFF -d BEI24@48000 "Wow Bass 03.caf" "Wow Bass 03.aif"

And now here is the most amazing part. It is super easy to execute the conversion of multiple files by just one command line.

for i in *.caf; do afconvert -f AIFF -d BEI24@48000 "$i" "${i%.caf}.aif"; done

or to run through subdirectories:

for d in */ ; do cd $d; pwd; cd ..; done
for d in */ ; do cd $d; for i in *.caf; do echo *caf; pwd; done; cd ..; done;
for d in */ ; do cd $d; for i in *.caf; do afconvert -f AIFF -d BEI24@48000 "$i" "${i%.caf}.aif"; done; cd ..; done

or with recursion by using find:

find -name "*.caf"
find . -type f -iname '*.caf' -print | while read -r name; do cp "$name" "/.../..."; done
find . -type f -iname '*.caf' -print | while read -r name; do afconvert -f AIFF -d BEI24@48000 "$name" "/Volumes/Daten/Logic/test/${name%.*}.aif"; done

afconvert -hf

• Supported Audio File and Data Formats in OS X