Actually there are two 24/7 streaming networks and I built them both.
The first one I built belongs to PAL/MSP and is called MSP Waves. I resigned from that group and went on to build a new station outside that community of my own, called SteemStar Network.
I no longer am involved in the first one, so finding out about it is an exercise for you to pursue, but to learn about SteemStar - just visit our website at http://steemstar.net or our blog here at @steemstarnetwork - tho I admit the blog is not always current. The site however, has a player running 24/7 on the homepage and the full live hosted,interactive show schedule as well.
Also its not "steemit" radio in either case, but rather "steem" radio. Steemit is just a fairly badly implemented blogging website on the steem blogchain. There are dozens of sites in the steem ecosystem, and its false to call anything but this one badly programmed blogging site "steemit" anything. The correct language is Steem, not steemit. STEEM is the cryptocurrency, and the name of the block chain. Steemit.com is just one tiny tiny portion of this world.