Avid Technology Pro Tools HD MADI, Manual

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Pro Tools | HD MADI Guide
6
Sync Mode LEDs
The SYNC MODE LEDs indicate the current
Clock Source as set in Pro Tools.
INT (Internal) Indicates HD MADI sample clock is
generated by its internal crystal oscillator, as deter-
mined by the session Sample Rate.
DIG (Digital) Indicates that MADI digital sync is
providing system clock.
LOOP
Indicates that HD MADI is slaving to an-
other peripheral using Loop Sync.
EXT (External)
Indicates that HD MADI is using
the Word Clock in port (BNC) for system synchro-
nization.
When synchronized to Word Clock, External
Clock input and output do not have to be at the
same Word Clock Rate. Synchronization to Exter-
nal Clock is typically 1x the current session sample
rate. However, for sample rates higher than 48
kHz, HD MADI generates a choice of 1x, 2x, or 4x
the base rate of 44.1 kHz or 48 kHz, as follows:
Sample Rate Convert
HD MADI provides real-time sample rate conver-
sion on Input or Output. Sample Rate Convert
(SRC) is configured in the Pro Tools Hardware
Setup dialog (
Setup > Hardware ).
Input Indicates HD MADI Sample Rate Convert
on Input is active.
Output Indicates HD MADI Sample Rate Convert
on Output is active.
AES/EBU
Indicates that AES/EBU is being used as
the clock source for the MADI ports when using
Sample Rate Conversion (SRC). If AES/EBU is
selected as the
Clock Source
for Sample Rate Con-
version in the Hardware Setup dialog, but no valid
word clock is detected, the AES/EBU LED blinks
on and off until a valid clock source is selected.
Word Clock
Indicates that the dedicated (SRC)
Word Clock ports are being used as the clock
source for the MADI ports when using Sample
Rate Conversion (SRC). If Word Clock is selected
as the external sync format for Sample Rate Con-
vert in the Hardware Setup dialog, but no valid
word clock is detected, the AES/EBU LED blinks
on and off until a valid clock source is selected.
Signal Present
The Signal Present LEDs indicate signal for Input
and Output. The top LED indicates input and the
bottom LED indicates output.
Input
Lights when signal is being passed to
Pro Tools from the MADI input ports.
Output
Lights when signal is being passed from
Pro Tools to the MADI output ports.
Session Sample Rate Word Clock Support
44.1 kHz 44.1 kHz
48 kHz 48 kHz
88.2 kHz 88.2 kHz
44.1 kHz
96 kHz 96 kHz
48 kHz
176.4 kHz 176.4 kHz
44.1 kHz
192 kHz 192 kHz
48 kHz