Lynx Studio LT-HD - Manual (Page 21)

Page 18
10 Aurora Parameter Controls
Since the Aurora with an LT-HD installed is intended to be accessed and identified as a
Digidesign 192 I/O, all routing and system settings that are applicable for ProTools sessions
should be initiated from within ProTools. There is no mechanism for parameter changes initiated
from the interface device to be communicated and correctly displayed within the ProTools
software.
When the ProTools software is launched and correctly identifies the Aurora as a 192 I/O, the
Aurora will enter a “ProTools LockOut” state, where some controls can only be initiated from
within the ProTools software. When the ProTools software is closed, the Aurora will return to its
former state, and allow manipulation from the front panel or from the Aurora Remote Control
software.
10.1 Front Panel Controls
When in the “ProTools LockOut” state, the Aurora front panel will reflect the following:
q
SAMPLE RATE
This button will not be active. The current, operating sample rate will be indicated by the
corresponding LED. When the sample rate is changed from within ProTools, the display will
update to show the current rate.
w
SYNC SOURCE
This button will not be active. The LED for the sync source which has been selected from within
ProTools will illuminate. When the ProTools software is first launched, the Aurora will be set to
Internal automatically. From that point forward, whatever sync source is selected from the
Hardware Setup within ProTools will become active whenever the software is launched. In this
context, the applicable choices are:
INT
Clock derived from the on-board crystal oscillator.
EXT Clock signal from WORD CLOCK input.
EXT/2 Clock signal from WORD CLOCK input running at half the desired sample rate.
When ProTools is set for the clock to operate at ¼ of the target sample rate, both the
EXT and EXT/2 LEDs will illuminate, indicating EXT/4 operation. (please note:
EXT/X operation is not supported with early versions of the LT-HD firmware).
AES A Clock signal from the AES I/O Port A Digital Input. Clock is derived from the first
valid AES/EBU channel.
Aurora 8 Clock signal from the AES inputs 1-4.