Digital Microphone Interface
The DMI-8, an eight-channel version of the digital microphone interface is considerably simplifying the setup for multichannel applications.
In addition to a word clock input and output, the DMIs also have an internal word clock generator. If no master word clock signal (e.g. from a mixing console) is present at the input, the DMI internal word clock is used automatically to synchronize the microphone channels, and the signal is switched to the word clock output.
External commands such as "On Air" (red light) can be controlled via a 9-pin user port.
Equipment that supports the AES 42 standard can process the output signals of Solution-D microphones directly. In all other cases, the DMI-2 or DMI-8 digital microphone interface is used. The DMIs convert the AES 42 data format supplied by the microphone into an AES/EBU signal.
The Interface is operated via the Neumann RCS remote control software, which is installed on a desktop or laptop computer. The computer is connected to the DMI via a USB port and a USB to RS 485 interface converter. If a large number of microphones is used, several DMIs can be cascaded. In this case, each digital microphone interface can be addressed individually.
AES42 input 8 x XLR 3F (Audio data in accordance with AES/EBU (AES3) data format,
Digital phantom power (DPP) and remote control data
AES/EBU output (AES3 Data format)
2 x SUB-D25 Yamaha® and Tascam® pinout
ADAT® 1 x Toslink, up to 48 kHz
GN OUT 1 x RJ 45 (special serial data format developed by GN, used as a gateway for integration in audio networks.
The GN signal will be used by Neumann’s
Multi Channel Audio Interface (MCA) for converting of the GN data format to formats such as EtherSound®, MADI, etc. (MCA available as option)
Word Clock (AES11) 2 x BNC for internal and external synchronization
CTL Bus (RS 485) 2 x RJ 45 ports (connection to computer USB port via the
Neumann USB 485 interface converter, connected in parallel for cascading purpose)
User port 9-pin SUB-D, 1 switch function per channel (mute and/or Light 1/2 selectable)
AES/EBU OUTPUT Routing
The AES/EBU signal includes 2 audio channels
- The distribution of the audio data of adjacent mono microphone channels between the audio channels of the corresponding AES/EBU output signal is as follows:
Channel 1 AES/EBU out Left Left: mic 1
Right: mic 2
Channel 2 AES/EBU out Left
Left: mic 3
Right: mic 4
Channel 3 AES/EBU out Left: mic 5
Right: mic 6
Channel 4 AES/EBU out Left: mic 7
Right: mic 8
Digital stereo microphones are supported at odd numbered AES42 microphone inputs only.
In this case the audio data of the microphone are routed to the left and right channels of the corresponding AES/EBU output.
Digital Microphone Interface DMI-8
CD with RCS software and USB driver
Connection Set for the connection between the DMI-8 and the USB port of the computer
DMI-8 EU silver Cat. No. 533130
DMI-8 UK silver Cat. No. 533132
DMI-8 US silver Cat. No. 533131
Permissible atmospheric conditions :1)
Operating temperature 0 °C … +45 °C
Storage temperature –20 °C … +70 °C
Relative humidity max. 90 % at +20 °C
AES42 inputs 8x XLR3F , Audio data in accordance withAES/EBU (AES3) data format, Digital phantom power (DPP)Remote control data
Phantom power (DPP) +10 V, max. 250 mA per channel, short-circuit proof
Remote control data Pulses (+2 V), superimposed on the phantom power, approx. 750 bits/s or 9,600 bits/s (depending on the microphone)
Outputs 2x SUB-D 25, AES/EBU (AES3) data format, Yamaha® and Tascam® pinout,
1x Toslink, ADAT® format up to 48 kHz, 1x RJ 45, GN format up to 192 kHz, incl. power-out pin: approx. +15 VDC, max.1 A, short-circuit-proof
Sampling rates supported 44,1 / 48 / 88,2 / 96 kHz /176,4 kHz/ 192 kHz
Microphone synchronization AES42 – Mode 2 (synchronous mode) Microphone clock control via PLL
DMI-8 Synchronization automatically to an external word clock or AES11 signal, if present, otherwise the internal word clock generator is activated.
Word clock (or AES11) input BNC
- Vin >100 mV at 75 ohms
Word clock (or AES11) output BNC
- Vout = Vin (external synchronization)
- Vout approx. 1.5 V at 75 ohms
(internal word clock generator)
Internal word clock generator 44,1 / 48 / 88,2 / 96 kHz / 176,4 /
192 kHz, Accuracy ±25 ppm
Indicators Power, Ext Word Clock, Valid,Level (microphone)
Control elements 8x Channel SelectGAIN +/–
Control bus 2 x RJ 45 ports; connection to computer USB port via the Neumann
USB 485 interface converter; connected in parallel for the purpose of cascading.
RS 485 with additional power-out pin (approx. +11.3 V, max. 500 mA)
Device address (ID) 0 to 15, adjustable viacoding switch on the backof the device
User port 9-pin sub-D, 1 switch function per channel (Mute and/or Light 1/Light 2 selectable)
Power supply 90 V to 240 V; 50/60 Hz
Power consumption < 55 VA
(W x H x D) 483 x 88 x 210 mm
Weight approx. 2,8 kg
1)All values are for non-condensing humidity.