RME ADI-648
Multichannel Audio Digital Interface

This Multichannel Audio Digital Interface offers format conversion from MADI to ADAT and vice-versa. The RME ADI-648 thus combines the world's most successful multi-channel interface with the professionals' exclusive high-end interface. MADI offers 64 channels of 24 bit audio at up to 48 kHz sample rate, and 32 channels at up to 96 kHz. Transmission happens over a single line, either coaxial (BNC) or fiber optic (network). In both cases the cable length can be more than 100 meters.

The MADI channels are transferred from and to 8 ADAT optical inputs and 8 outputs via TOSLINK. Furthermore, the RME ADI-648 contains an easy-configurable 8-channel 16x16 Matrix Router. Any of the outputs, which are divided into 8-channel blocks, can be fed from any 8-channel input block, both on the ADAT and the MADI side. With this, there is not only free routing within the M-A and the A-M conversion, but also splitting and routing within the same format. An 8-channel input block can be routed to any number of output blocks in parallel. Some application examples:

Managing long distances with a single cable
ADAT breakout box for devices with MADI interface
Connecting MADI-based equipment to RME's Hammerfall series
ADAT optical patchbay and router
MADI coaxial / optical or vice-versa converter and splitter
MADI redistributor, patchbay and router
The RME ADI-648 is compatible to all forms of increasing the sample rate (Double Speed). It supplies word clock in single or double speed, distributes 96 kHz signals in Double Wire mode into the MADI data stream, or per Sample Split (S/MUX) to the ADAT ports, but is also capable of double MADI rate (96k Frame). The RME ADI-648 thus also represents an ideal MADI front-end for the Hammerfall and Hammerfall DSP series.

SyncAlign® and SyncCheck®, technologies known from and proven by other RME products, allow for perfect sync between all channels and easy notification of error states. And of course multiple devices can be cascaded and synchronized sample-accurate using word clock. The RME ADI-648 accepts 56 channels, 64 channels and 96k frame at its input, and can be set to generate those formats at its output. This way the RME ADI-648 even serves as perfect interface between otherwise incompatible MADI devices!

The compact device with 19" width and 1HU has numerous further outstanding features, like Intelligent Clock Control (ICC) and storing of the settings. It's even possible to transmit 16 MIDI channels in parallel to all 64 audio channels. A fully automatic input selection between optical and coaxial input offers a useful redundancy mode for critical applications. Extensive status displays give information about Lock and Sync states, audio content and the physical quality of the incoming signal. A digital PLL, designed especially for the RME ADI-648, allows for operation without an additional word clock line. The reference clock is then extracted from the MADI signal itself.

The rear of the RME ADI-648 looks clear and tidy. Eight ADAT optical inputs and outputs each, two MADI inputs and outputs each (coaxial, optical), word clock I/O (BNC) with switchable termination, and two DIN MIDI jacks offer unbeatable flexibility and compatibility.

RME ADI-648 TECHNICAL SPECIFICATIONS AND FEATURES

Input MADI: 1 x BNC, 1 x optical
Output MADI: 1 x BNC, 1 x optical
Input ADAT optical: 8 x TOSLINK, 24 bit, Bitclock PLL
Output ADAT optical: 8 x TOSLINK, 24 bit
Input word clock: BNC, Signal Adaptation Circuit (functional from 1.2 Vss input signal), switchable termination
Output word clock: BNC, low-impedance driver stage, 4 Vss into 75 Ohms, short-circuit-proof
MIDI input and output: via two 5-pin DIN jacks
Sync sources: MADI, ADAT optical, word clock, internal
Varipitch: by input signal or word clock
Sample rates: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, variable (Sync/word clock)
Sample rate range: MADI: 32 kHz - 96 kHz, word clock: 27 kHz-105 kHz, ADAT: 33 kHz - 57 kHz
Jitter: Internal clock < 1 ns, word clock In < 3 ns, ADAT In < 2 ns
Jitter sensitivity: all PLLs operate even at 40 ns Jitter without problems
Power supply: internal switching mode ps, 100 V-240 V AC, 50-60 Hz, 10 Watts

Dimensions: 483 x 44 x 200 mm
Warranty: 2 years