When using a USB hub, note that the bandwidth of the PC's USB port is not increased and stays the same. Moreover, some USB devices may be notably more demanding than others, such as multi-channel USB audio interfaces or external hard drives, so it is crucial to test your USB hub thoroughly if you intend to use it for real-time audio processing.
Note that all USB hubs are not created equally. A quality, self-powered, hub will go a long way. Some interfaces require a good quality self-power hub, otherwise noise and dropout issues may occur.
If you are troubleshooting issues with your USB audio interface, make sure it is not connected to an external USB hub, but directly to a USB port on your PC or laptop. We recommend to always use a spare USB port, not a hub.
If necessary, consider upgrading to a premium USB cable. If you experience hum or noise when using your USB audio interface, you may want to upgrade your USB cable to a premium cable with extra shielding and a Ferrite Bead (it suppresses high-frequency electronic noise in electronic circuits) which can filter out some external noise.
Also make sure you do not allow the computer to turn off USB hub devices to save power, as explained in Device power management section.
