No.
But you can kludge it by using software from streamwhatyouhear.com - takes output if PC sound card and broadcasts to your network as a stream. You then tune in you SB to the URL.

There is also a Linux alternative that you can run on a Pi which with a suitable USB sound card will convert any audio to a stream that SBs can tune in to. For example TV audio or (with a preamp) audio from a Turntable.