Yamaha LS9-32 Owner's Manual - Page 207

Word clock settings 1 2 3 LS9-32 1 Clock frequency This indicates the frequency of the currently selected clock source. This field will indicate "UNLOCKED" while synchronization is lost, such as immediately after switching the master clock. B Clock select buttons These buttons select the master clock source. You can choose from the internal clock, the word clock signal supplied from the WORD CLOCK IN connector, or the word clock data included in the input signal from an I/O card in a slot. C Card type {Card type / Slot number} This area shows the type of I/O card installed in the slot. {On the LS9-32, this area shows the slot number and the type of I/O card.} 3 Use the clock select buttons to select a clock source. You can choose one of the following clock sources. ● INT 48 k ● INT 44.1 k The LS9's internal clock (sampling rate 48 kHz or 44.1 kHz, respectively) will be the clock source. Choose one of these if you want to use the LS9 as the word clock master. ● WORD CLOCK IN The word clock signal supplied from the rear panel WORD CLOCK IN jack will be used as the clock source. In this case, the LS9 will operate as a word clock slave. ● SLOT {SLOT 1/2} The clock data included in the digital audio input signal from a digital I/O card in the slot {slots 1/2} will be used as the clock source. (Select this in two-channel units.) In this case, the LS9 will operate as a word clock slave. The status (operating state) of the clock data being received from each port is indicated by the color of the symbol displayed immediately above. Each color has the following significance. ● LOCK (light blue) This indicates that a clock synchronized with the selected source is being input. If an external device is connected to the corresponding connector or slot, input/output is occurring normally between that device and the LS9. If the sampling frequency is close, this status may be displayed even if not synchronized. ● LOCK, BUT NOT SYNC'ED (yellow) A valid clock is being input, but is not synchronized with the selected clock source. If an external device is connected to the corresponding connector, input/output cannot occur correctly between that device and the LS9. ● SRC ON (green) This is a special status that is unique to a digital I/O card with SRC (Sampling Rate Converter) functionality installed in the slot {slots 1/2}; it indicates that SRC is enabled for the corresponding channel. If this status is displayed, normal input/output with the LS9 is occurring even if the signal is not synchronized. ● UNLOCK (red) A valid clock is not being input. If an external device is connected to the corresponding connector, input/ output cannot occur correctly between that device and the LS9. ● UNKNOWN (black) This indicates that the clock status cannot be detected because no external device is connected or because there is no valid clock input. You will be able to select this connector/slot, but successful synchronization cannot occur until a valid connection is established. If the symbol for the port selected in step 3 has turned light blue, and the clock frequency is shown in the upper left of the window, this indicates that the LS9 is operating correctly with the new clock. HINT • If you use a digital I/O card that contains a sampling rate converter (e.g., MY8-AE96S), input and output can occur normally with the LS9 even when unsynchronized. In this case, turn on the SRC button for the slot/channel that is receiving the signal (→ p. 208). NOTE • If the symbol for the selected clock does not turn light blue, make sure that the external device is correctly connected, and that the external device is set to transmit clock data. • Noise may occur at the output jacks when the word clock setting is changed. In order to protect your speaker system, be sure to turn down the power amp volume before changing the word clock setting. • If you attempt to select a channel whose SRC is on as the word clock source, a message will appear, warning you that the sampling rate converter will be disabled. 4 20 To close the WORD CLOCK popup window, move the cursor to the CLOSE button (or the × symbol in the upper right) and press the [ENTER] key. You will return to the SYSTEM SETUP screen. Other functions LS9-16/32 Owner's Manual 207