Turtle Beach Micro II USB adapter

Turtle Beach's Audio Advantage Micro II USB sound card is the cheapest way ($25) to add a stereo analog and optical digital output to a Mac or PC.  The stereo output drives powered speakers, headphones or an external recording device. A built-in amplifier delivers crisp, clear sound on headphones or ear buds. 

The included mini Toslink optical jack adapter plugs into the mini headphone output and can output digital signal to DACs and digital capable home theater systems, digital speakers and other digital audio devices. This digital connection lets you enjoy DVD or streaming digital movies on your Mac or PC in high-quality, pure digital format.  

Mac users please note that newer Macs already output Toslink digital over its 3.5mm headphone output, so this product is geared towards PCs.

By installing an optional driver, the digital output can also send 5.1 channel Dolby® Digital or DTS™ surround sound as an encoded digital audio stream to your home theater system. (Only available on the Windows platform.)