i-tec U2AMETAL User Manual page 4

INSTALLATION IN OS WINDOWS, MAC OS and LINUX
In these systems the drivers are be installed automatically as "USB Audio Device". Then you
can use audio system of type 2.0 only. This you can check in the Hardware Manager.
It is necessary to set the audio for replay and recording as the default setting. An example
for W8.1 is shown in the picture below (select Control Panels → Audio → Loudspeakers →
USB Audio Device → Set as default):
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