This format cannot be automatically detected at the receiver side.
Quad Speed (176.4 kHz, 196 kHz)
Quad speed MADI does not have a standardized frame format. Therefore S/MUX 4 is used. The encoding
works the same way as S/MUX 2, except that four consecutive channels are used to transport one audio
channel. This reduces the available number of channels to 14 ("56 Ch." setting) or 16 ("64 Ch." setting).
When using MADI, the sample rate of the incoming MADI signal and the expected frame
format of the outgoing MADI signal must be set in the device.
9.2.2. Connecting Two Identical MADI Signals for Redundancy
The coaxial MADI input can be configured to automatically switch to an existing MADI optical signal in
case the coaxial signal fails. While existing routing and clock settings from the coaxial MADI input are
kept, the port’s name is changed to
MADI Auto Input
and its icon changes to reflect the feature. The
failover is seamless if the active input loses lock abruptly (e.g. one of the cables is unplugged).
The user is notified of the lost signal with a warning and redundancy can be
re-established.
For a seamless failover, the two MADI signals must be identical. However, only the SYNC
and LOCK states are evaluated to confirm the current input state. It is therefore possible to
send two different signals to the 12Mic as long as they are in sync.
To create MADI redundancy:
1. Switch on "enable MADI redundancy" in the
coaxial
tab of the
INPUT
section. The port will be
renamed to MADI Auto Input.
2. Create a routing from MADI Auto Input to any output.
3. If the device should also slave to MADI Auto Input, choose it as clock master in the
CLOCK
section.
4. Connect both MADI signals with identical audio.
9.3. AVB Input Streams
The AVB streams
received
by the 12Mic are referred to as "input streams". For these streams, the device
acts as an
AVB Listener
.
To establish a connection between a talker and a listener, an
AVDECC Controller
is required. The 12Mic
does not include an AVDECC Controller.
AVB input streams are monitored as follows:
Description
Indicator
Possible solution
Disabled
grey
Create connection with AVDECC
controller
Streaming/Receiving
green
No Data
red
Verify proper talker configuration
SR Mismatch
red
Verify that the sample rates of talker and
listener are identical
RME 12Mic User’s Guide
47
| 9.3. AVB Input Streams
