Playing music on stream

[Piotr Jasielski]

Hey. That's maybe sort of a dumb question, nonetheless I don't know how to make music play on my twitch stream. I was playing some mix from youtube (on my headphones) but the stream was muted. I know how to enable my mic, but I have no idea how to play music in backgound.

I'd appreciate some help for the dumb man :(

If you're interested, here is my stream: http://www.twitch.tv/piotr_jasielski