Chapter 7: 003 Rack Front Panel 53
Aux In (to Monitor) Switch This switch routes
the Aux In input pair directly to the Main Mon-
itor and Headphone Outputs.
Alt CR (Control Room) Switch This switch mutes
the Main Monitor output and routes the signal
to the Alt CR output.
Mono Switch This switch temporarily combines
Output 1–2 in the Main and Alt Monitor Out-
puts and the Headphone Outputs. This is help-
ful for checking the phase relationships of stereo
material.
Monitor Mute Switch This switch mutes the
Main and Alt Monitor Outputs only, and has no
effect on the Headphone Outputs. Monitor
Mute is automatically engaged when you power
up the unit.
Status Indicators
Host (“1394”) Status Indicator
The Host status LED, marked “1394” below its
LED, indicates that communication has been es-
tablished between the unit and Pro Tools LE
software (or another software application)
through FireWire.
Sync Indicators
The Sync LEDs indicate the current clock source.
When the current clock source is not estab-
lished, the respective LED flashes.
If none of the Sync LEDs are lit, 003 Rack’s clock
source is set to Internal.
There are three Sync LEDs:
W Clk (Word Clock) LED Lights when clocking
to Word Clock.
S/PDIF LED Lights when clocking to the S/PDIF
on the RCA or Optical port.
ADAT LED Lights when clocking to ADAT on the
Optical port.
MIDI Data Indicators
The MIDI Data LEDs indicate the presence of
MIDI data on the MIDI In, MIDI Out 1, or MIDI
Out 2 ports. Individual LEDs are provided for
each port. Active sensing is not indicated.