The is an external USB sound card adapter designed to add 5.1 surround sound to desktops, laptops, game consoles, and even some TVs. For years, it has been a popular budget solution for users who need multi-channel analog output (Front, Rear, Center/Sub) without investing in an expensive internal PCIe sound card.

: The device has minimal internal filtering for the subwoofer. You must use a subwoofer with its own built-in low-pass filter to prevent high frequencies from leaking into the bass. Noise/Hiss

: Cycles through inputs. LED indicators usually follow this pattern: : Optical 1 (SPDIF1) : Optical 2 (SPDIF2) No LED/Aux : Analog input 2.1/5.1 Switch