How can I convert my FLAC music collection to Apple Lossless?

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http://askubuntu.com – I have a reasonable sized music collection that I keep in FLAC format on my Ubuntu laptop. I'd like to start playing this music on my Mac, and to sync it from there to my iPod. People have suggested that the best way to do this is to convert my collection to ALAC, and I've decided that's what I want to do. Before I dive in and write custom shell scripts that call ffmpeg through some complex find command, I thought I'd ask for advice. How can I best convert my existing FLAC collection to ALAC, without any loss of audio quality and preserving all of the metadata? (HowTos)