I have a 90's vintage Yamaha surround sound receiver connected to my Apple TV via the TOSLINK digital optical cable. I'm not able to get any sound whatsoever out of the TOSLINK - Apple TV connection. The receiver produces fine surround sound from my Blu-Ray player via TOSLINK, but only when the Samsung Blu-Ray player is in "Audiophile" mode. The receiver also works with my Samsung TV TOSLINK output on Hi-Def broadcasts.