Hi @sandra.brueckner
I checked your file and this is due to an issue between Maya connector and Audio2Face when write/read .usd file with blendshapes. We made a fix for that and will release a new audio2face very soon. Sorry for the inconvenience!
In the meantime, you can try this file, I fixed the part that was wrong, and confirmed that this is working for blendshape conversion.
The fix I made → I had to remove “blendShape1” from all the pose names in skel:blendShapes attribute.
template-model_mayaUpdate.usda (8.3 MB)