User guide

Pro Tools
®
HD card
The Pro Tools
®
HD card is designed to operate as a Clock Slave, locking to a clock reference signal provided by the audio unit
connected to its primary port.
Delta-Link MADI HD
The Delta-Link MADI HD, like the Pro Tools
®
HD card, is designed to operate as a Clock Slave. Once the card and
Delta-Link MADI HD are connected together, they can be seen as a unit requiring an external clock reference signal. However,
this unit now has MADI ports, instead of the “Digital and Analogue” connections to other devices provided by Pro Tools
®
interfaces.
Although a reference signal is embedded in the Primary port, the MADI connection requires a separate WordClock signal.
Therefore, the Delta-Link MADI HD is equipped with a WordClock input connector.
Depending on the type of unit that is connected to the MADI port, the sample rate will no longer change automatically when
a setting is selected in the PC or Mac software (because there is no command channel). Therefore, the sample rate must be set
manually at both ends (in the Pro Tools
®
software and on the hardware connected to the MADI port).
10
4. Synchronization