I can see people can submit their own videos, illustrations, photos and vector art for sale to Adobe Stock, but I can't find anything about submitting your music/sound effects anywhere. Is it possible to sell your music on Adobe Stock or does Adobe receive all their audio from some other companies and all you can sell are photos, videos, illustrations and vector art?
There are some areas that are reserved for a select circle of people. Music may be submitted by invitation only.
Any idea how you might get an invite?
(Personal opinion only) I don't think Adobe are in the business of sending invites. They will be dealing with established figures. If you represent a major agency for stock music you may be able to make contact. Clearly, they are not interested in managing individual submissions otherwise there would be a path. It may be that Adobe lack qualified staff to do quality control of audio, so they prefer to deal with someone whose reputation is already built.
Personal opinion: @Test Screen Name is right. All requests for those areas have been blocked off by Adobe until now.
You are welcome to contact contributor support on this: Need help? (stock contributor support)