Well you're only streaming 2.0, tho, right? My blurays are usually 7.1, some 5.1 (with Atmos or not). Often the soundtracks are not only cd-lossless but 24/96 too. So wasn't sure what you were streaming from who....I only do 2.2 but, all the video disks that I own (with a few exceptions like: The Three Stooges, Laurel & Hardy, etc), I think, are capable of 5.1 & most 7.1
As to broadcast, while it could be done (& you'd pay for it, too), I've never seen it done.