User`s guide
User's Guide OctaMic © RME
10
Pinout D-sub
Signal
In
1/2+
In
1/2-
In
3/4+
In
3/4-
In
5/6+
In
5/6-
In
7/8+
In
7/8-
D-sub
24 12 10 23 21 9 7 20
Signal
Out
1/2+
Out
1/2-
Out
3/4+
Out
3/4-
Out
5/6+
Out
5/6-
Out
7/8+
Out
7/8-
D-sub
18 6 4 17 15 3 1 14
GND is connected to pins 2, 5, 8, 11, 16, 19, 22, 25. Pin 13 is not connected.
8.2 ADAT Optical
The ADC Module provides two digital outputs in ADAT optical format.
As the ADAT optical signal is physically specified up to 48 kHz only, the ADC Module auto-
matically activates Sample Split mode (S/MUX) at 88.2 and 96 kHz, distributing the data of one
input to two output channels. The internal frequency stays at 44.1/48 kHz. Therefore the sam-
ple clock at the ADAT outputs is only half the frequency of the AES outputs. As interesting as
this is – you don't need to think about it. 96 kHz capable ADAT hardware, like all current RME
digital interfaces, re-combine the data automatically. The user (and the DAW software) does
not see any split data, but just single channels at the expected double sample rate.
At frequencies not higher than 48 kHz (Single Speed), the outputs MAIN and AUX operate si-
multaneously and carry the same audio data. With this it is possible to distribute the output
signal to two devices (2 x ADAT splitter).
Up to 96 kHz (Double Speed), the ADAT outputs can be used in parallel to the AES outputs. In
Quad Speed mode (128 kHz up to 192 kHz), the ADAT outputs are operated synchronously at
Single Speed sample clock, but do not provide any audio data.
The ADAT optical outputs of the ADC Module are fully compatible to all ADAT optical inputs. A
usual TOSLINK cable is sufficient for connection.
ADAT Main
Interface for the first or only device receiving an ADAT signal from the OctaMic. Carries the
channels 1 to 8. When sending a Double Speed signal, this port carries the channels 1 to 4. In
Quad Speed mode ADAT MAIN carries an empty but synchronous ADAT signal.
ADAT AUX
Copy of the data at the MAIN output. When sending a Double Speed signal, this port carries
the channels 5 to 8. In Quad Speed mode ADAT AUX carries an empty but synchronous ADAT
signal.