RME Audio ADI-192 DD, Руководство пользователя

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User's Guide ADI-192 DD © RME
21
The outputs of the ADI-192 DD support all currently known formats in the range of 32 kHz up to
192 kHz. The current output format is defined by the button STATE in the AES OUTPUT sec-
tion:
•
Single Wire (no LED): 8 channels 32 kHz – 192 kHz. 2 channels per AES wire. The effective
sample frequency equals the clock on the AES wire.
•
Double Wire (LED DW): 4 channels 88.2 kHz – 192 kHz. 1 channel per AES wire. The effec-
tive sample frequency is double the clock of the AES wire.
•
Quad Wire (LED QW): 2 channels 176.4 kHz – 192 kHz. 1 channel via 2 AES wires. The
effective sample frequency is four times the clock of the AES wire.
All these conversions are lossless. Only the existing samples are spread on all the channels.
The options DW and QW are intelligently coupled with the choice of DS/QS in the CLOCK
SECTION. When the unit operates in Single Speed mode, neither DW nor QW can be selected.
When the unit operates in Double Speed mode, SW (Single Wire, no LED) or DW can be se-
lected. When the unit operates in Quad Speed mode, all three options SW, DW and QW are
available.
The distribution of the samples performed in the Double Wire mode equals the S/MUX method
and is done as follows:
Channel
Port L
1 R
1
L
2
R
2
L
3 R
3
L
4
R
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
Port L
1 R
1
L
2
R
2
L
3 R
3
L
4
R
4
Samples 1a 1b 1c 1d 2a 2b 2c 2d
7.2 TDIF
The TDIF port includes both input and output. Therefore all the information found in chapter 6.3
applies here as well.
Without sample multiplexing being active, the port AUX is operated synchronously, but does not
provide any audio data (empty frame).
When selecting SOURCE TDIF in the TDIF OUTPUT section, some devices will generate
audio feedback, because in such a case their input and output is directly connected by the
ADI-192 DD.
The Quad Wire method of the ADI-192 DD allows to record two channels at up to 192 kHz with
every (!) DTRS device.
Unfortunately Tascam's TDIF implementation is incompatible to Quad Wire, as the samples are
not transmitted in the order of 1-2-3-4, but 1-3-2-4. In case the special 192 kHz mode of the
DTRS machine DA-98HR shall be used, the machine should be connected and used with the
ADI-192 DD via AES.