User's Guide HDSP AES-32 - RME

The outputs of the HDSP AES-32 support all currently known formats in the range of 32 kHz up
to 192 kHz. The current output format is defined in the section Output Format depending on the
sample rate:
Double Speed
When the card operates in the range of 64 kHz to 96 kHz, Single Wire and Double Wire are
available as output format.
• Single Wire: 16 channels. 2 channels per AES wire. The effective sample frequency equals
the clock on the AES wire (64 kHz – 96 kHz).
• Double Wire: 8 channels. 1 channel per AES wire. The effective sample frequency is double
the clock of the AES wire (32 kHz – 48 kHz).
Quad Speed
When the card operates in the range of 128 kHz to 192 kHz, Single Wire, Double Wire and
Quad Wire are available as output format.
• Single Wire: 16 channels. 2 channels per AES wire. The effective sample frequency equals
the clock on the AES wire (128 kHz – 192 kHz).
• Double Wire: 8 channels. 1 channel per AES wire. The effective sample frequency is double
the clock of the AES wire (64 kHz – 96 kHz).
• Quad Wire: 4 channels. 1 channel via 2 AES wires. The effective sample frequency is four
times the clock of the AES wire (32 kHz – 48 kHz).
All these conversions are lossless. Only the existing samples are spread on all the channels.
The default setting is Single Wire. The card then operates gapless in the range of 32 kHz up to
200 kHz with full 16 channels.
The distribution of the samples performed in Double Wire mode equals the S/MUX method and
is done as follows:
Channel L R L R L R L R
Port
1 1 2 2 3 3 4 4
Samples 1a 1b 2a 2b 3a 3b 4a 4b
The distribution of the samples performed in the Quad Wire mode equals the S/MUX4 method
and is done as follows:
Channel L R L R L R L R
Port
1 1 2 2 3 3 4 4
Samples 1a 1b 1c 1d 2a 2b 2c 2d
22.3 MIDI
The HDSP AES-32 offers two MIDI I/O via 5-pin DIN connectors. The MIDI ports are added to
the system by the driver. Using MIDI capable software, these ports can be accessed under the
name HDSP AES-32 MIDI. Using more than one HDSP AES-32, a consecutive number is
added to the port name, like AES-32 MIDI In 1 (2) etc.
The MIDI In port is available for both GSIF (GSIF-2 Low Latency) and standard MME MIDI simultaneously.
40 User's Guide HDSP AES-32 © RME