User's Manual
User's Guide HDSPe AIO Pro © RME
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19.3 SPDIF (Coaxial, Optical)
Input
The SPDIF input (optical/coaxial) is configured in the Settings dialog, available by a click on the
hammer symbol in the Task Bar's system tray. The HDSPe AIO Pro accepts all commonly used
digital sources as well as SPDIF and AES/EBU.
Output
Identical signals are available at both the optical and the coaxial output. An obvious use for this
would be to connect two devices, i.e. using the HDSPe as a distributor (1 on 2).
Apart from the audio data itself, digital signals in SPDIF or AES/EBU format have a header con-
taining channel status information. The HDSPe AIO Pro ignores the received header and cre-
ates a totally new one for its output signal.
An Emphasis indication gets lost as there exists no standardized interface on computers to
handle this information!
The AIO’s SPDIF channel status has been implemented according to IEC60958:
32 / 44.1 / 48 kHz, 64 / 88.2 / 96 kHz, 176.4 / 192 kHz depending on the current sample rate
Audio use, Non-Audio
No Copyright, Copy Permitted
Format Consumer or Professional
Category General, Generation not indicated
2-channel, No Emphasis
Aux bits Audio Use, 24 bit
Operation as second AES/EBU I/O
Receiving signals in AES/EBU format requires a cable adapter. Pins 2 and 3 of a female XLR
plug are connected individually to the two pins of a phono plug. The cable shielding is only con-
nected to pin 1 of the XLR - not to the phono plug (see chapter 19.2).
Professional AES/EBU equipment can be connected to the HDSPe AIO Pro thanks to the ‘Pro-
fessional’ format option with doubled output voltage. The required cable is the same as the one
for the input, but with a male XLR plug instead of a female one.
19.4 MIDI
The HDSPe AIO Pro offers one MIDI I/O via two 5-pin DIN connectors. The MIDI ports are add-
ed to the system by the driver. Using MIDI capable software, these ports can be accessed under
the name AIO MIDI. Using more than one HDSPe AIO Pro, the operating system adds a con-
secutive number to the port name, like AIO MIDI In (2) etc.
The MIDI In port is available for both DirectMusic MIDI and Windows MIDI simultaneously.