rewrite vorbis metadata script

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http://ubuntuforums.org – I would like to rewrite the date tag in my vorbis encoded music files. Soundconverter is setting the date as e.g. 2010-01-01 and I find it highly annoying. I want to write a script to repair and set the date as 2010. I can use ogginfo to retrieve the date easily enough but I want something simple to patch the file with the new date. How do I achieve this? (Hardware)