User Manual

TWINLANe mirroring
In a mirroring configuration, the DSP engine that is performing the system’s audio processing is said to be in
the “active” state, and the DSP engine that is waiting as a backup is said to be in the “standby” state. When
starting up in a mirroring configuration, the default is that A starts in the active state and B starts in the
standby state. The DSP engine that is running in the standby state synchronizes to the parameters of the DSP
that is running in the active state.
When the active DSP engine stops operating and the standby DSP engine fails-over (automatically switches
to the backup system when an accident occurs), synchronization processing is performed but the sound is
not interrupted. Depending on the reason that the active DSP engine stopped operating, there might be
cases in which failover will not occur. In such cases, you’ll need to switch systems manually. Even in such
cases, synchronization processing occurs automatically. Whether the audio is interrupted will depend on the
state in which the active DSP engine’s operation stopped. We cannot guarantee that the audio will be
uninterrupted.
Even if failover occurs, the active DSP engine that is the word clock master will continue operating as long as
the word clock continues to be supplied.
NOTE
Do not turn off the power of the active DSP engine. If the power is turned off, the audio will be interrupted. If word clock supply from
the active DSP engine that is the word clock master is interrupted, the standby DSP engine automatically becomes the substitute
wordclock master. However, the audio is interrupted during this switch.
The indicator above the DSP popup button in the SYSTEM CONFIG screen (see the SYSTEM CONFIG popup
screen) shows which DSP engine (A or B) is the word clock master.
After failover, if the replacement unit provided for A (the active DSP engine) and unit B (the standby DSP
engine) that was operating after the failure are operating simultaneously, the parameters that had been
edited on unit B will be lost. In the state where DSP engines A and B are each operating as the word clock
master, and mirroring is occurring, both units are set as the word clock master. In this case, one unit must be
removed from being a word clock master. Since this operation cannot be performed from the panel of the
control surface, it must be performed from the front panel of the DSP engine.
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Network and Connections > TWINLANe mirroring