10.3.1. Setting the Output Channel Format and Frame Pattern
Depending on the requirements of the receiver, it is possible to change the channel format and frame
pattern of the outgoing MADI streams.
To change the channel format of both MADI outputs on the device:
1. Go to one of the
MADI
tabs in the
OUTPUT
section.
2. Toggle the switch to
56Ch
or
64Ch
to adjust number of output channels.
56Ch and 64Ch format correspond to 28/32 channels at double speed, and to 14/16
channels at quad speed.
To change the frame pattern of both MADI outputs on the device:
1. Go to one of the
MADI
tabs in the
OUTPUT
section.
2. Toggle the switch for 96k to use the 96k frame at 88.2 kHz and 96 kHz.
96k frame setting is only used at sample rates 88.2 kHz and 96 kHz and is otherwise
ignored.
It is not possible to select separate settings for each MADI port. Both ports will be affected
regardless which output tab is used to change the setting.
10.3.2. MADI Daisy Chains
MADI is a uni-directional protocol with a fixed number of channels. When more than two MADI devices
are connected, a serial connection is required. This is also referred to as a "daisy chain". The output of
the first device is connected to the input of the second device, the output of the second device to the
input of third device, and so on, until the signal is plugged into the input of the first device.
It is important to understand that each device must be programmed to pass on audio from its MADI
input to the MADI output. Otherwise, the last device would only receive the channels of one device.
While many RME devices pass on MADI signals automatically, the 12Mic must be explicitly
configured to do so.
In order to pass on signals, configure the output routing of the required output port to pass on the signal
from the MADI input port.
The latency of the MADI I/O is four samples.
10.3.3. MADI Port Mirroring
A redundant MADI connection protects from loss of audio in case of a single cable failure. To achieve
redundancy, the receiver must support MADI redundancy. The sender must send two identical MADI
signals on two outputs, usually the coaxial and optical ports.
The 12Mic features independent routing for both MADI output ports. For this reason, a "mirroring" of the
signal must be manually created. In order to do this, the routing of the two MADI outputs should be
configured to contain the same routing.
RME 12Mic User’s Guide
10.3. MADI Outputs |
52