Ok people...time for help here. Ive got a mix of old and new apple tvs, and I'm encoding using the latest HB Nightly Build High Profile setting. ?....Does the old atv support 5.1 sound??? Because everything ive been encoding with the new setting, will not play on the old atvs. But I thought it did support 5.1. I understand the difference in capabilities regarding video size /rates etc. But sound Im not clear on. Can someone set me straight here?