User manual RME OCTAMIC

[. . . ] User's Guide OctaMic / OctaMic D Portable Professional Mic Preamp 8-channel Microphone / Line Preamp with Line Outputs Universal Power Supply Input Optional 8-Channel 192 kHz 24 Bit ADC AES-3 24 Bit Interface Contents Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Brief Description and Characteristics. . . . . . . . . . . . . . . . . . . 3 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The status 'Professional' should always be active when sending data to a device with AES/EBU input (when XLR connectors are used). User's Guide OctaMic © RME 9 Pinout D-sub Signal D-sub In 1/2+ 24 In 1/212 In 3/4+ 10 In 3/423 In 5/6+ 21 In 5/69 In 7/8+ 7 In 7/820 Signal D-sub Out 1/2+ 18 Out 1/26 Out 3/4+ 4 Out 3/417 Out 5/6+ 15 Out 5/63 Out 7/8+ 1 Out 7/814 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 automatically 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 sample 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 simultaneously 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. 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. User's Guide OctaMic © RME 10 9. Word Clock 9. 1 Operation and Technical Background Correct interpretation of digital audio data is dependent upon a definite sample frequency. Digital signals can only be processed or transferred between devices if these share the same clock. [. . . ] Nowadays many devices with SPDIF input can handle Professional subcode. Devices with AES3 input almost always accept Consumer SPDIF (passive cable adapter necessary). User's Guide OctaMic © RME 14 11. Accessories Part number 37011 Description Power supply for HDSP CardBus card Robust and light weigth switching power supply, 100V-240V AC, 12V 1. 25 A DC. 12. Warranty Each individual OctaMic undergoes comprehensive quality control and a complete test at RME before shipping. [. . . ]