Operator Manual

220 Chapter 28: Delay Compensation (Latency)
PRO2 Live Audio System
Owner’s Manual
The input to direct output latency depends on the direct output mode and the Inserts
option of the Input Channel insert delay compensation status according to the
following table.
Masters to matrix tap-off-point
The signal path that feeds master bus signals onto matrix channels is fully compensated
for so that signals fed direct to matrix channels or indirectly to matrix channels via
master channels will always line up at the outputs, as will signals sent only to masters
or only to matrix channels.
The user is given the choice of tap-off point, so they may choose to send either a
pre-master or post-master channel processed signal to the matrix channels. This is a
global setting and affects all master -> matrix contributions, as shown in the following
diagram.
Figure 21: Master and matrix tap-off points
Sending pre-processed master bus signals to matrix channels reduces the overall
system latency. If post-processed tap-off points are used, the system must
compensate for both the latency of the matrix and master channels, and if insert and
GEQ compensation are both required on master and matrix channels, this can push the
maximum system latency up to 8.49 ms. With no other insert or GEQ compensation
switched on, using post-processed tap-off points produces a system latency of 2.72 ms,
as opposed to pre-processing tap-off points, which would produce a latency of 2.38 ms.
When Monitor Mode (Align with Masters) is switched on, these figures are 1.79 ms
and 2.14 ms, respectively.
Direct Output mode
Input channel insert compensation (ms)
Off On
Pre-processing 0.59 0.59
Post-processing 0.948 1.78
Master Channel
Matrix Channel
+
From Inputs / Aux Sends
& Aux Returns
From Inputs / Aux Sends
& Aux Returns
Pre / Post Setting