If the noises are clicks or pops, try adjusting the buffer:
https://www.rolandus.com/support/knowledge_base/201979129
If the noises are not clicks or pops, continue with the following troubleshooting:
Notes:
- Keep power cables and audio cables as far apart from each other as possible. If power or audio cables must cross paths, keep them at 90 degree angles to each other--instead of running side-by-side.
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Computers, lighting (especially florescent lighting), electronic appliances and such can all play a role in grounding noise. Make sure these devices are not on the same circuit as the audio gear or computer.
- Be sure that balanced cables are being used to connected from the VS-100's outputs into the speakers.
Troubleshooting:
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For troubleshooting purposes, physically disconnect ALL USB devices from the computer except the mouse and the VS-100—this includes disconnecting the keyboard, printer, USB hub and/or USB breakout box, etc). If the noise disappears, troubleshoot the device introducing the noise.
- Physically disconnect any cables connected to any inputs or outputs of the VS-100 and troubleshoot with headphones--this means that a USB cable and headphones are the only cables physically connected to the VS-100.
NOTE: Be sure that speakers are not connected to the VS-100 or plugged into any power outlets for this troubleshooting.- If the problem disappears, the noise is being introduced from one of the audio cables or the speakers themselves. Start reconnecting cables, one by one, until the noise is reintroduced.
- If the noise still continues, try using ground lifts on the speakers (if available) as you may have a grounding issue.
- If the problem still continues, leave all cables physically disconnected from the VS-100, except for the USB and headphones, and continue troubleshooting:
- Try connecting the VS-100 directly to each USB port on the computer (do not use a USB hub or USB breakout box for this test)—to rule out one or more USB ports causing the problem.
- Move the VS-100 away from the computer video monitor and the computer itself—as the video monitor or computer may be introducing this noise.
- Disconnect the VS-100 and test with the computer’s internal soundcard. If the noise problem continues, the VS-100 is not the cause of the problem.
- Connect the computer’s power, and the computer video monitor’s power to a different power circuit. The noise may be a result of dirty power or another issue from the original power circuit.
Be sure that the computer's power, the video monitor's power, the VS-100's power, the speaker's power and any other connected audio devices are all connected to the same outlet--on the same circuit. - Test on a different computer to determine if there is an issue with the VS-100 that continues on a different computer system.