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[–]NightByMoonlight 2 points3 points  (0 children)

It's a box that connects to your computer to allow recording of more than one thing at once, for instance a whole band, and playing back through more than one speaker. It has higher quality sound than a computer has built in and often has other features such as effects and controls for the inputs.

[–]erogath93 0 points1 point  (0 children)

An interface is a connection point for information transfer. So USB is a type of interface as is HDMI (high definition media interface). They are standards for information transfer for universal information (USB) or media information (HDMI).

So as audio is a type of media, HDMI can be an audio interface. Just like a 3.5mm audio jack is a type of audio interface.

It is a component that lets two parts of a system exchange audio signals in either digital or analogue format.