I found two articles online dated May 9, 2017 announcing that Sketchfab had added audio to VR and 3D scenes. One article seems to have disappeared but can be read in google cache. The blog link in the cached articles is no longer valid. It kinda looks like either someone ran an story before things were finalized or that Sketchfab did release the feature and then pulled it back for some reason. Can anyone here explain?