Does Realtek Audio Have a Digital Output?

I recently purchased an Inspiron 531s and am trying to use it with Boston Acoustics BA735 speakers. These are DIGITAL speakers and thus require a digital output from the sound card. Despite a lot of searching, I cannot find out if the Realtek audio device in the 531s is capable of driving these speakers and, if so, how to enable it.

 

Can anyone tell me if the Realtek audio is capable of driving digital speakers? If so, how do I enable it?

 

Running Windows Vista Home Premium.

 

Thanks for the help.