I hope you discover a solution and pass it along!
I tried a Windows (WIN7) and an Ubuntu software solution, both reproduced the music perfectly (line-out on the show computer) to both a phone app and a browser app (windows media, etc.) but I couldn't find a solution that didn't delay the transmission. No way I have the answers, but it was fun trying!

joe
That's a little discouraging but I suspected that might be the case, might give it a try anyway to see what can be done.