DigiDesign 96 I/O Руководство - Страница 10

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Loop Master LED

The LOOP MASTER LED indicates which

Pro Tools|HD audio interface is the master

Pro Tools peripheral. Loop Master defaults to

the first Pro Tools|HD I/O connected to the core

card. On Pro Tools|HD (for PCIe), this is the Ac-

cel Core card. On Pro Tools|HD (for PCI), this is

the HD Core card.

The Loop Master LED is always lit when only a

single interface is present, regardless of the syn-

chronization mode.

In expanded systems, only one Pro Tools|HD

I/O can be Loop Master at a time. When you

change the clock source to an external clock on

a Pro Tools|HD I/O, it automatically becomes

the Loop Master and all other Pro Tools|HD I/Os

in the chain switch to Loop Slave mode.

Sync Mode LEDs

The SYNC MODE LEDs indicate the current

Pro Tools Clock Source and Sync mode:

INT (Internal) The 96 I/O standard clock setting,

this mode illuminates when the 96 I/O sample

clock is generated by its internal crystal oscilla-

tor, as determined by the session Sample Rate.

DIG (Digital) Indicates that an external AES/EBU,

Optical (ADAT), or S/PDIF device is providing

master clock to Pro Tools.

LOOP (Loop Sync) Indicates that the 96 I/O is

slaving to another Pro Tools|HD I/O through

Loop Sync.

EXT (External) Indicates the 96 I/O External

Clock In port is providing master clock to

Pro Tools.

For more information on Pro Tools clock op-

tions, see the HD Setup Guide.

96 I/O Guide

Input and Output LEDs and Meters

16 sets of four-segment LEDs indicate signal

level for each of the 96 I/O channels.

These meter LEDs indicate –42 dB, –18 dB,

–6 dB, and 0 dB (from bottom to top), refer-

enced to Full Scale digital.

Full Scale digital (0 dBFS) does not always

indicate signal clipping levels. Use the on-

screen meters in Pro Tools to determine

whether a signal is clipping. For more infor-

mation, see the HD Setup Guide .

Two additional LEDs, located to the left of the

meters, indicate whether the meters display in-

put or output levels; the meters indicate output

levels by default, and can be switched from the

Hardware Setup dialog in Pro Tools.