When we listen to music, there’s more often than not a digital-to-analog converter (DAC) in the signal path between the source, the amplifier, and the loudspeakers or headphones that ultimately deliver the sound to our ears. Those two components can make or break your audio experience.

When your source playback device is a computer, the quality of the DAC you’re using becomes even more important. Computers are great at lots of things, but audio reproduction isn’t their forte and computer manufacturers don’t invest significant sums into the computer’s DAC or headphone amplifier; most don’t even pay much attention to isolating the computer’s audio components from the electrically noisy environment inside the computer’s case. Installing a high-end sound card in a desktop machine is one option, but you can’t do that with a laptop. That’s where Optoma’s NuForce uDAC5 comes in.
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https://www.techhive.com/article/3121659/home-audio/optoma-nuforce-udac5-usb-dsd-dac-review-this-little-box-reveals-all.html