OP-Z - how do i remove usb noise? [video] July 01, 2021 17:05 Updated here's a video showing how to remove OP–Z usb noise by disabling usb charging: for more information please see the user guide. Related articles OP-Z - how do i perform a factory reset? OP-Z + OP-1 - can i sync them? [video] OP-Z - how long does the battery last? OP-Z - is there an Android app? OP-Z, how to chain patterns?