We’ve touched on one side of social networking this week with Pheed, and now it’s time to look at another, with social giant Twitter adding a splash of sound to its online presence.

With millions of people using the micro-blog social service known as Twitter, the company is rolling out a way to listen to artists who use its service.

You can tell everyone what you're listening to.

Existing on music.twitter.com, the add-on to Twitter invites its users to tune into tracks by known artists who have Twitter accounts, allowing you to check out what’s hot, what’s trending, who your friends are listening to, and even follow more musicians.

You can check out those musicians and see what musicians they follow, and so on and so on, listening to different tracks in the process.

What's hot? Twitter Music aims to tell you.

Twitter Music runs on both its web service and iOS – with an iPhone app – and by default, will play samples of tracks unless you have access to a full paid account on Rdio or Spotify.

An Android version of the app is coming, with release likely to be later this year.