User Manual

42
User's Guide HDSPe RayDAT © RME
Pin assignment of the 9-pin D-sub connector, breakout cable SPDIF / AES
Note
: The digital breakout cable is identical to the one used in the DIGI96 and other HDSP se-
ries cards.
Pin Name Pin Name Pin Name
1 GND 4 AES Out + 7 SPDIF In -
2 SPDIF Out + 5 AES In + 8 AES Out -
3 SPDIF In + 6 SPDIF Out - 9 AES In -
22.4 Word Clock
With the HDSPe RayDAT the usage of word clock is usually unnecessary and obsolete, be-
cause the card can extract its clock perfectly from the digital input signals. Due to SteadyClock’s
highly efficient jitter suppression the HDSPe series refreshes and cleans up any clock signal,
and provides it as reference clock at all the digital outputs (see chapter 30.6). Therefore word
clock I/O is only possible via the optional WCM9632 Expansion Board. Its word clock input can
be set to high-impedance or terminated (75 Ohms) by pushing the switch on the slot bracket.
Thanks to a low impedance, but short circuit proof output, the WCM9632 delivers 4 Vpp to 75
Ohms. For wrong termination with 2 x 75 Ohms (37.5 Ohms), there are still 3.3 Vpp at the out-
put.
Selecting Single Speed in the Settings dialog causes the output signal to always stay within the
range of 32 kHz to 48 kHz. So at 96 kHz sample rate, the output word clock is 48 kHz.
22.5 MIDI
The HDSPe RayDAT offers two MIDI I/O via two 5-pin DIN connectors each. The MIDI ports are
added to the system by the driver. Using MIDI capable software, these ports can be accessed
under the name HDSP MIDI. Using more than one HDSPe RayDAT, the operating system adds
a consecutive number to the port name, like HDSP MIDI In (3) etc.
The MIDI In port is available for both GSIF (GSIF-2 Low Latency) and standard WDM MIDI
simultaneously.
The third software-only MIDI port, HDSP MIDI In 3 (1), provides MTC, in case the TCO has
been connected and receives a valid input signal.