Keith McMillen Instruments QuNexus RED, User Manual

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Some users may experience ground loop issues when simultaneously using the QuNexus USB MIDI, CV outs,
and a computer with a USB Audio interface� Most often the cause of this noise is a ground loop between the
USB ports of the QuNexus and the audio interface� If you are having this issue, try disconnecting the QuNexus
from the computer and powering it with a USB power supply/charger� You can still control MIDI devices and
software using the QuNexus MIDI Expander port and 3rd party USB MIDI Interface�