Answer from taglib, Hi Ton, As far as I know, DSDIFF/DSF was never part of an official TagLib release. It was merged into master (2018-10-27, d71398c9), but it was later removed (2019-09-12, 074f30e3) with the commit message Remove DSF and DSDIFF from master to a feature branch These can be merged back into master once they're in a more mature state. @Scott: Can you tell us what exactly were the problems which led to this removal? The code still exists in the taglib2 branch. It is not difficult to include support for a new tag format in a project which is using TagLib, that code does not have to be part of TagLib, so the Strawberry Musicplayer could add DSF support to its source code. I did this myself for https://invent.kde.org/multimedia/kid3/, but I used another implementation from https://github.com/pekingduck/metadsf (2015-03-11, 18687eb2), and I had to add a few fixes based on bug reports from users, so an alternative to the stuff in the taglib2 branch could be the src/plugins/taglibmetadata/taglibext/dsf folder in the Kid3 sources. Jonas, was this helpful?