How to use speakers and headset?

I know there already was a question about this, but without an answer...

I use a USB-headset und my speakers, I would like to hear music via speakers.
With the Windows Media Player this is ́nt a problem, I can change the output device in the settings, but can ́t find an option like this in songbird...
Maybe I have not seen it, or an addon makes it possible?

Using Windows 7...

Thanks!