hi,
as you know, in SoLoud, the number of filters are limited
we should implement more like different reverbs, fir and irr filters, (these could be used to implement HRTF support), Chorus, One Poll, One Zero, Pole Zero, Two Pole, Two Zero, etc
a library exists called stk under zlib license which already implemented these maybe we can implement some of these out

https://github.com/quodlibet/mutagen-specs

This was born when http://id3.org/ was down for a few months (it's down again right now). And then I started to copy the specs there, but that doesn't scale and isn't maintainable.

We should still have links and references to all the information that's useful so we can delete mutagen-specs.

Hi, I've been trying to get additional tags from itunes m4a files. for example album artist which should be aART based on https://help.mp3tag.de/main_tags.html

I added this to config.xml

<library-options>
      <id3>
        <auxdata>
          <add-data tag="aART"/>
        </auxdata>
      </id3>
</library-options>

and import.js

var aartist = obj.aux['aART'];