[Romsol92]

Are you using this version ?

audiodecoder.sacd 0.1.2-Matrix

Yes. It downloaded directly through the Kodi repository. I confirmed that it is the version number.

I'm using version 1.0.4.1 with Libreelec 9.2.6 (Kodi 18.9) and the addon finds SACD ISO's and plays them just fine but not all of them and especially not multi-channel ISO's. I am anxious to see if the newer version works on all SACD ISO's when the next version of Libreelec is released.

When you say it finds them, where exactly does it find them? Is it supposed to be it's own category, or do you launch them from within Music or Videos or Movies? I don't see that there is any actual functionality if the add-on is launched. It is just configuration settings like adjusting the volume.