234 Chapter 28: Delay Compensation (Latency)
PRO6 Live Audio System
Owner’s Manual
Monitor Mode (Align with Masters)
The default control centre bus structure is organised such that inputs can be routed to
masters and also simultaneously routed to masters and matrix channels via the aux
(aux send) busses (Figure 26) or via the aux and return buses (Figure 25), while
maintaining the same overall input to output latency in both paths.
This may not be the desired structure if aux (aux send) and matrix outputs are both
being used for monitor mixes, where it is desirable for aux, masters and matrix outputs
to be time-aligned with the minimum possible latency.
When this switch is on, the delay element that is used to delay the paths from input
channels to master/matrix channels is removed. With all insert and GEQ delay
compensation switched off, the latency between a system input XLR and a system
output XLR being fed by an aux, master or matrix channel is 1.83ms (Figure 27).
In this mode, it is advisable to use the same GEQ and insert compensation settings for
aux and master/matrix channels to maintain their identical output latency.
Figure 25: Routing via the aux send and return buses
Figure 26: Routing via the aux send buses
Figure 27: Latency for normal routing
Input channel
Delay
Master channel
Matrix channel
Aux return
channel
External FX
Aux send
channel
Input to aux output
latency = 1.5ms
Input to master/matrix output
latency = 3.39ms
Monitor Mode (Align with Masters) = off
Send-FX-Return = on
All other compensation = off
Input channel
Delay
Master channel
Matrix channel
Aux send
channel
Input aux output
latency = 1.5ms
Input to master/matrix output
latency = 2.26ms
Monitor Mode (Align with Masters) = off
All other compensation = off
Input channel
Delay
Master channel
Matrix channel
Input to aux/master/matrix output
latency = 1.84ms
Monitor Mode (Align with Masters) = on
All other compensation = off
Aux send
channel
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