Convert mp3 to CAF

I’m learning Swift, using the book Hacking With Swift.  The author suggests using audio files in the CAF format because they load quickly.  This is a format I had never heard of before, and there are not a lot of tools around that seem to export to it.  I made a little Automator service that gets the job done:

make caf.workflow

(Then while writing this post I re-read the relevant section of Hacking With Swift and realized that CAF is just AIFF with a different extension.  You can convert to AIFF in Audacity or whatever.  But you know what?  I will probably use the Automator service anyway.  It will be handy for converting already edited mp3 files to CAF.)