Yamaha QL5 Reference Manual - Page 184

Recovering after overcurrent at the USB port Even if the connection with the USB device was stopped because an overcurrent condition occurred at the USB port, it is possible to use the USB device again without turning the console power off and back on. Setup Word clock and slot settings "Word clock" refers to the clock that provides the basis of timing for digital audio signal processing. To send and receive digital audio signals between devices, those devices must be synchronized to the same word clock. If digital audio signals are transferred in an unsynchronized state, the data may not be transmitted or received correctly, and noise may be present in the signal, even if the sampling rates are the same. Specifically, you must first decide which device will transmit the reference word clock for the entire system (the word clock master), and then set the remaining devices (the word clock slaves) so that they synchronize to the word clock master. If you wish to use the QL series console as a word clock slave that is synchronized to the word clock supplied from an external device, you must specify the appropriate clock source (the port through which the word clock is obtained). This section explains how to select the clock source that the QL series console will use. STEP 1. In the Function Access Area, press the SETUP button. 2. In the SYSTEM SETUP field of the SETUP screen, press the WORD CLOCK/SLOT button. 3. In the MASTER CLOCK SELECT field of the WORD CLOCK/SLOT window, select a clock source. 4. Press the "x" symbol located in the upper right to close the window.  Recovery procedure After removing the cause of the overcurrent at the USB port, press the location that shows "USB REMOUNT" at the FORMAT button of the SAVE/LOAD window. SETUP screen WORD CLOCK/SLOT window 184 Reference Manual