Free batch converter/normalizer to/from CAF (Core Audio Format) file

Question

Is there any free tool capable of doing the job?

Answer 1

You didn't supply very much information, such as your OS and your desired output format, so I can not give you a detailed answer.

CAF is a container format that can support several audio formats, but Apple Lossless (ALAC) is probably the most common.

ffmpeg can decode ALAC in CAF:

ffmpeg -i input.caf output.wav

This can be turned into a "batch" command with a Bash "for loop".

for f in *.caf; do ffmpeg -i "$f" "${f%.caf}.wav"; done

sox can be added to this example to normalize your audio:

for f in *.caf; do ffmpeg -i "$f" -f sox - | sox --norm=-3 -t sox - "${f%.caf}.wav"; done

As usual, using a recent ffmpeg is recommended since development is so active. See the FFmpeg download page for various methods to acquire it.