That doesn't seem to answer the question - the schemes on your link still have a dealer with access to the original secret I think? Is it possible to have each

That doesn't seem to answer the question - the schemes on your link still have a dealer with access to the original secret I think? Is it possible to have each participant contribute an input that forms part of the original secret, such that they get combined to form the secret and then split into shares in a way that doesn't require a dealer?