Allen&Heath M-MADI - Manual

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MADI
ACE
GLD-80
I/O Module MADI
T-112
iDR-48
UNDERSTANDING M-MADI
M-MADI is one of a range of option cards which can be fitted to an iLive to enable integration with other systems.
Multi-channel Digital Audio Interface (MADI) is an industry standard protocol for digital audio supported by many manufacturers.
Typically MADI is used for multi-channel recording and playback. Long coaxial cable runs are possible depending on the driver capability of
the hardware, making it a frequent choice of equipment interconnection in gigs, studios, and broadcast applications.
E.g. a 150m (490’) cable-run is reliable M-MADI to M-MADI using 75ohm Belden 1505A cable. MADI cables are directional, so there is one
connector for MADI-out, and one for MADI-in. It is a point-to point interface between a source and a destination.
M-MADI gives access to 64 input and 64 output channels and can be fitted
to:
 Port B expansion slot in iLive fixed format MixRacks (iDR-16, iDR-
32, iDR-48 & iDR-64) or expander (xDR-16)
 Port B and/or Port A of iLive modular MixRacks (iDR0, iDR10) if
fitted with the RAB-2 standard.
 Port A of iLive modular Surfaces 80/112/144/176 if they are fitted
with the new RAB-2 standard.
 I/O Module slot in GLD-80.
FEATURES at a glance
Dual link mode: connect and stream with two separate devices. Inputs to the system can be patched from the two MADI streams in blocks of
8, while the same outputs are broadcast on both links.
Redundant mode: Link 1 and Link 2 can be used as a redundant pair. Audio and clock will continue if one of the cables fails.
Aux BNC:
 Out 1 mirror: This mode duplicates the MADI stream ‘Out 1’, useful for splitting signals to multiple devices.
 In 1 Thru: The MADI stream ‘In 1’ is passed ‘thru’, allowing daisy chaining of signals to an unlimited number of devices. The signal is
fully reclocked and buffered for optimal reliability, and the signal will automatically switch to ‘In 2’ if ‘In 1’ fails in redundant mode.
 WordClock IN: Provides a word clock input to sync the system from an external (48 KHz) source, for example a distributed word clock.
This is a high-sensitivity input, locking to a word clock signal as low as 200 mV p-p.
 WordClock OUT: A standard word clock output to allow other systems to sync from the iLive system, useful when connecting to 3 rd party
MADI devices which may not be able to sync from the MADI stream.
APPLICATION EXAMPLES
Record / playback <64 channels with a computer system, MADI audio
interface and suitable DAW.
M-MADI also provides BNC word clock connection to fixed format MixRacks
for external sync operations.
Here, M-MADI provides redundant digital split
linking between an iLive and a GLD system; <64
channels from the master MixRack are sent to the
Monitors system for independent processing. The
signals can also be sent to a record system or
third console via the Aux BNC connector.
iDR-48