AES/EBU with Rock and NUC

[Petri (Petri K.)]

You can find an answer to this from the GLM operating manual (pages 69-70).

GLM_3_System_Operating_Manual.pdf

The hardware volume controller can also be used for adjusting the sound level when the computer
is detached from the GLM adapter. When this is done, the GLM adapter must be powered with a
standard USB power supply. The voltage output of the USB supply is 5 VDC.