ALLEN & HEATH iDR-4 User's Guide download pdf (Page 33)

iDR-4 User Guide 33

Loop back system

This example shows two iDR-4

units connected with the audio bus looped back from the last

to the first. This means that all inputs are available to both units

using the patchbays and matrix. Note that each unit must have

its own session of iDR System Manager running for

configuration.

The loop back system uses the audio expander ports. In this

configuration these are no longer available for plugging in the

iDR-in and iDR-out expanders.

 Force sync master Because it is not obvious to the

looped units which is the audio sync master, you need to

manually assign one of the units to be the master. If this is not

done then the operation of the units is unpredictable. Do this

from within the iDR System Manager session for the unit you

want to be the master, usually the first in the chain. Open the

File menu, Preferences, Synchronisation Options window. Tick

the Force Sync Master item.

To avoid feedback oscillation make sure you do not

route any output back to itself. Plan carefully how you will

use the input and output source patchbays and routing

matrix. Make sure all your patches are created to avoid

feedback problems.

FORCE SYNC MASTER

IN OUT

iDR-4 - A

1234

SYNC SLAVE

IN OUT

iDR-4 - B

78910

OUT

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 47 48

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ALLEN & HEATH iDR-4 User's Guide Page 33