Specifications
HD MADI Guide14
Clock Source
The Pro Tools Hardware Setup dialog lets you se-
lect the Clock Source for your Pro Tools system.
Internal If you are recording an analog signal di-
rectly into Pro Tools, you will usually use the
Pro Tools Internal clock source.
External If you are transferring material into
Pro Tools from an external digital device, or if
you utilize a common house clock signal, you
will synchronize Pro Tools to that digital device
or common signal. The external options for HD
MADI are dependant on the sample rate and in-
clude:
To select the Clock Source:
1 Choose Setup > Hardware.
2 Choose the clock source from the Clock
Source pop-up menu.
3 Click OK.
Identify
If you have multiple audio interfaces of the
same type connected to your system, you
should confirm the identity of each interface.
This ensures that you select the appropriate in-
terface in the Peripherals list when defining its
inputs and outputs, and other settings, in the
Hardware Setup dialog.
To identify audio interfaces in your system:
1 Choose Setup > Hardware.
2 From the Peripherals list, select an audio inter-
face connected to your system.
3 Select the Identify option, located in the lower
left corner of the Hardware Setup dialog. This il-
luminates all the LEDs on the front panel of the
selected audio interface.
4 Make a note of which interface in your studio
setup corresponds to the identified interface.
5 Repeat the above steps for each additional au-
dio interface in your setup.
Available Clock Sources for HD MADI
44.1/48 kHz 88.2/96 kHz 176.4/192 kHz
SYNC/SYNC
HD (if present)
SYNC/SYNC
HD (if present)
SYNC/SYNC HD
(if present)
Internal Internal Internal
MADI IN MADI IN MADI IN
Word Clock
(44.1/48 kHz)
Word Clock
(44.1/48 kHz)
Word Clock
(44.1/48 kHz)
Word Clock
(96 kHz)
Word Clock
(176.4/192 kHz)
Your digital input device must be connected
and powered on for Pro Tools to synchronize
to it. If your input device is not powered on,
leave the Clock Source set to Internal.
Use the Up and Down Arrow keys to scroll
though the Peripherals list in the Hardware
Setup dialog.