Actually, Twitter isn’t launching a music service, but a discovery engine. Actual music will initially be served from iTunes, Spotify or Rdio. Previews will by default come from iTunes while subscribers to Spotify and Rdio can log in to hear streams of full songs.
Today, we’re releasing Twitter #music, a new service that will change the way people find music, based on Twitter. It uses Twitter activity, including Tweets and engagement, to detect and surface the most popular tracks and emerging artists. It also brings artists’ music-related Twitter activity front and center: go to their profiles to see which music artists they follow and listen to songs by those artists. And, of course, you can tweet songs right from the app.
The songs on Twitter #music currently come from three sources: iTunes, Spotify or Rdio. By default, you will hear previews from iTunes when exploring music in the app. Subscribers to Rdio and Spotify can log in to their accounts to enjoy full tracks that are available in those respective catalogs. We will continue to explore and add other music service providers.
So, if you’re interested in the songs that have been tweeted by the artists and people you follow on Twitter, you can navigate to #NowPlaying to view and listen to those songs.
The official App for this service can be downloaded from here