OVERVIEW:

Additional features include:

	Native support for AES Double and Quad Wire
	Native support for MADI Double and Quad Wire
	Direct conversion between these formats
	Automatic Delay Compensation when using more than one unit
	Analog stereo monitor output, up to 192 kHz
	Detailed status display for MADI and AES
	Completely remote controlable via MIDI
	Transfer of MIDI data via MADI
	SteadyClock for maximum jitter reduction and clock regeneration

The compact unit with 19" width and 1 unit height serves as format converter MADI to/from AES . MADI handles 64 channels of 24 bit audio at sampling frequencies up to 48kHz, 32 channels up to 96kHz, and 16 channels up to 192kHz. All channels are transferred across a single cable, either coaxial (BNC) or optical network cable. In both cases, cable lengths of more than 100 meters can be achieved. The AES/EBU channels are provided via 4 XLR inputs and outputs, respectively. The ADI-642 accepts 56 channels and 64 channels as well as 96k and 192k frame at its input, and can be set to generate those formats at its output. This way the ADI-642 even serves as perfect interface between otherwise incompatible MADI devices.

FEATURES:
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.

The ADI-642 is compatible to all forms of increasing the sample rate. It supplies word clock in Single, Double und Quad Speed, distributes Double Wire 96kHz signals into the MADI data stream and to the AES ports, and even supports the double MADI sample rate (96K frame). The same applies to 192 kHz (Quad Wire, 192 kHz frame). The SyncAlign(r) and SyncCheck(r) technologies known from other RME products ensure perfect synchronization and clear detection of errors. Also multiple units can be stacked and operated sample-aligned, using word clock. All settings are stored when the unit is switched off.

Additionally the ADI-642 features an easy-to-use 72 x 72 Matrix Router. An input signal can be assigned to every output channel, both for AES and MADI. This not only allows free signal routing during format conversion, but also forwarding and routing of signals within the same format. An input signal can also be distributed to any number of outputs. With more than one ADI-642, several MADI signals can be combined (merged) to one MADI stream.

16 MIDI channels can be transferred across MADI (even with 64 audio channels). The device can be fully remote controlled and configured via MIDI, and all status displays can be queried through MIDI. Each ADI-642 can be given a separate ID, allowing separate remote controllability of various devices with only one MIDI channel.

Application examples include:

	AES/EBU frontend for RME's HDSP MADI
	AES/EBU breakout box for any MADI device
	Digital Multicore, allowing signal transfer across long distances with a single cable
	MADI coaxial/optical or vice versa converter
	MADI redistributor, patchbay and router
	AES/MADI inserter
	MADI merger

RME's SteadyClock™ lets the ADI-642 use MADI without an additional word clock connection, and guarantees excellent clock quality in every situation. Due to the highly efficient jitter reduction, any clock signal (even AES and Wordclock) can be improved and refreshed, and subsequently be used as reference clock at the word clock output. Intelligent Clock Control (ICC) will retain the last valid sample frequency in case of a loss of the input signal.

Automatic Delay Compensation eliminates technically inherent delays when signals are transferred from one unit to another. Each device automatically reconizes its position within the chain and delays AES data to ensure sample synchronized operation of all AES in- and outputs.

The analog monitor output operates in stereo and has a low impedance. It can be used as line and headphone output and supports 192 kHz at 119 dBA SNR. The routing matrix can assign any of the 36 stereo input pairs to the monitor output.

AUTO DELAY COMPENSATION:
A typical application example is the use of a HDSP MADI PCI-card in a computer with the ADI-642 as external AES interface. As MADI transmits 64 channels, up to eight ADI-642 can be used to provide all 64 channels via 32 AES I/Os. The integrated Matrix Router makes such a setup easy to be configured. The MADI signal is passed through from device to device. The Matrix is used to route the AES channels 1-8 to MADI 1-8 at the first ADI-642, at the second to MADI 9-16 and so on. When passing through the MADI signal, a delay of a few samples per ADI-642 occurs, causing the AES inputs and outputs to show an offset. This problem is fixed by the Automatic Delay Compensation. Each ADI-642 detects automatically which unit it is within the chain, and corrects the AES input and output data so that all AES I/Os operate sample-aligned.

The ADI-642 is compatible to MADI interfaces of companies like Sony, Merging, Lawo, Euphonix, Stagetec, Jünger, Audio Service, AMS and others

TECHNICAL SPECIFICATIONS: