So Ujo is a dead project, apparently, but Audius seems to be rising in its place. Apparently it’s already decentralized and recently began running on the Ethereum main-net and also relies upon IPFS for content hosting.
It already seems to be more developed than Ujo ever became, but with a different angle of approach, which is basically like SoundCloud meets Spotify. Being already decentralized, opensource, allowing sign-ups without an Ethereum wallet, and enabling lossless audio upload are a few ways it’s already ahead of Ujo, and, by virtue of the former two, it should prove more or less a permanent platform (which Ujo never achieved, hence how it is now considered to be shuttered).
Now, I was actually quite enthusiastic about Ujo, and Audius should eventually offer sales, digital collectibles, and so on, which is something Ujo did manage to achieve and in interesting ways; as such, I am hoping Audius will adopt some aspects of its predecessor, like setting automatic division if sales revenue between collaborators through smart contracts.
One thing both platforms lack is a full-fledged social layer (comments mainly, though there are at least some basic forms of aggregation), which is not a trivial matter in this manner and level of decentralization. I suspect one possible route of implementation could be through Ethereum World.
Anyway, this is one thing I’ve been really keen to see in the distributed/decentralized space, and though I joined up a little while ago, it recently took me by surprise in just how much ground has already been covered. I still have to give the white paper a good look, but so far it seems fairly solid here at the ground floor.