I Tunes connectivity
How do I run ITunes from my computer wirelessly through my home theater receiver?
You would have to purchase something that is AirPlay capable such as an Apple TV or AirPort Base Station. Those devices are capable of connecting to your receiver by either HDMI (Apple TV) or standard 3.5mm to RCA wire (AirPort). You would then be able to select either of those devices from iTunes to stream to.
Apple - AirPort Express Base Station - White
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Apple TV® - Black
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