I've heard from DJ friends that there are plugins that let Spotify play on [say] two DDJs at once, perhaps through Rekordbox. Perhaps even on a pocket computer. (I an not an expert on DJ fare -- I just hang out with these guys and help make it happen.)
And I'm sure that Spotify works usually, and I'm sure it's against the Spotify ToS, but I'm also sure that this level of reliance on end-to-end Internet connectivity is bound for inescapable failure.
Eventually.
(For our "little" pop-up off-grid DJ rig, which was not actually particularly small: I made sure we had redundancy for everything we felt we needed: Power, amps, sources, speakers, and the rest of the works -- except Internet. We assumed, going in, that the Internet would be useless and thus none of our actual-plans relied on it, and we also knew that we were pretty far from any civilization that could garner us replacement parts.)
That sounds right; Serato has something similar. (I keep meaning to write something for Mixxx to be able to do that with Jamendo...)
What's really jaw-dropping for me is the deezer-based live stem extraction, where you can press a button and just be playing the vocals or the drums. (This is, weirdly, fundamentally the same tech that makes those pictures, which still astounds me.) I still get annoyed with the "sync" button because it doesn't let me do a half-beat lead-in. I will probably always be a dinosaur in this field, which is fine. But I would at least try to pass on the hard-earned knowledge that you have to assume in a live performance any given system will fail at some point.
And I'm sure that Spotify works usually, and I'm sure it's against the Spotify ToS, but I'm also sure that this level of reliance on end-to-end Internet connectivity is bound for inescapable failure.
Eventually.
(For our "little" pop-up off-grid DJ rig, which was not actually particularly small: I made sure we had redundancy for everything we felt we needed: Power, amps, sources, speakers, and the rest of the works -- except Internet. We assumed, going in, that the Internet would be useless and thus none of our actual-plans relied on it, and we also knew that we were pretty far from any civilization that could garner us replacement parts.)