Is it possible to get digital audio output from a MacBook Air (2011), like on other Macs? I know the audio line-out port on the MacBook Pro &ndash; and even older MacBooks and the Mac mini &ndash; sport a dual capability: in addition to providing the expected and obvious 3.5mm analog stereo audio output, the port is capable of digital optical audio output.

Then by using a Mini-TOSLINK cable, it is possible to connect such a Mac to an A/V receiver (or a dedicated DAC, if you're really into this kind of thing) and thereby enjoy fully digital audio from the Mac.

Sadly, I also understand the MacBook Air does not enjoy this dual-purpose audio output port.  I tried, and I checked the specs, and I was disappointed it is simply plain analog stereo.  So, what I'd like to know is:

Is it possible, using a third-party device, to produce digital audio output from a MacBook Air?  I'm wondering if this may be possible via USB or the Thunderbolt port.  Do such devices exist?
Yes its possible and here is an example of a USB to Digital audio output adapter, just like the ones found on other Macs, but external.



Turtle Beach Audio Advantage Micro II USB Analog &amp; Digital Audio Adapter