User Manual

CONTENTS
Supporting a new HY144-D-SRC card
3 RIVAGE PM series V2.2 Supplemental Manual
This new digital I/O card supports four options for SRC (Sampling Rate Converter) mode, as well as
the Dante digital audio network. It can handle 144 channels and be installed in the HY card slot.
■ About SRC mode
Five SRC mode options are provided. You can switch to each mode option by writing firmware that
supports the desired mode on the HY144-D-SRC.
*1 Synchronous SRC: If the clock of the Dante network, and that of the device with the HY144-D-SRC
card installed, are synchronized at a clock ratio of 1:2 (48 kHz

96 kHz or 44.1 kHz

88.2 kHz), then
data at various sampling frequencies can be transmitted without sacrificing input or output
channels. If the Dante network is operating at 44.1 kHz, the frequency response above 18 kHz
will slightly deteriorate due to the elimination of aliasing.
*2 Asynchronous SRC: In this case, the clock of the Dante network and that of the device with the
HY144-D-SRC card installed do not have to synchronize with each other. You can specify
sampling frequencies separately.
NOTE
• If you are using Synchronous (144io Sync SRC) mode:
If you assign this card in a device on the Dante network as the clock master, the card will operate at
twice the clock value at which it was originally synchronizing to the network.
Example: If this card was operating as a Slave on the 48 kHz Dante network, it will now operate at a
clock of 96 kHz which is generated based on the PTP master clock on the Dante network.
If you plan to set the clock master to Internal or TWINLANe SLAVE on the device that has this card
installed, use Dante Controller to check the “Enable Sync to External” option for this card, and
operate the card as the master on the Dante network.
• You cannot specify a card operating in Asynchronous SRC mode as the clock master. Specify a
different device as the word clock master.
To change the SRC mode, you must rewrite the firmware by using Dante Firmware Update Manager.
For more information, please refer to the “HY144-D-SRC Firmware Update Guide”.
The procedure to mount a card and configure it for Dante audio network can be used with any
HY144-D card.
Supporting a new HY144-D-SRC card
Mode name SRC Number of input
channels
Number of output
channels
144io None 144 144
144io Sync SRC Synchronous SRC
*1
144 144
72io Async SRC Asynchronous SRC
*2
72 72
144i Async SRC Asynchronous SRC
*2
144 0
144o Async SRC Asynchronous SRC
*2
0144