I'd like to add replay gain tags to my entire flac library. What software can I use (Windows GUI or command-line) to do this? It will need to traverse the entire directory structure and add both track and album gain tags. Albums are organized one per directory.

foobar would most likely be the easiest way..

You can use the metaflac command line utility to do it.


Would work fine in any *nix type system, but the metaflac binary itself doesn't expand wildcards (instead relying on the shell to do that), so using Windows you would have to do something like:


Not quite the easiest way to do it, but it could be possible to automate the process with scripting.

I would go with Cyaneyes' suggestion - Foobar would be your best bet.