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I'm looking for a software (Windows or Linux) or an Android application that, given a folder, automatically and batch fetch the albums covers, and then write them down as ID3 tag.
It should support MP3 and FLAC and be free.
Try MusicBee. It has a "download artwork" feature which should do the trick for you provided you have the correct ID3 tags. It is a Windows software and it should support flac.
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