Opentalk FM is described as 'Live Audio Broadcasting Radio App. Opentalk is a platform to have live audio talks. Whatever you speak can be listened by listeners live and later. You can talk to your friends, followers or just go solo' and is an app in the Audio & Music category. There are four alternatives to Opentalk FM for a variety of platforms, including Linux, Android, Windows, FreeBSD and Mac. The best alternative is Pandora FMS. It's not free, so if you're looking for a free alternative, you could try Headphones or Listenbox.
Downloads can happen through Usenet using SABnzbd or via BitTorrent—it's up to you. All you need to do is fill in the settings so things are handled the way you prefer. And wow, you can really fine-tune your preferences.