Operation Manual

Zones 257
PRO Series Live Audio Systems
Owner’s Manual
Zones
The PRO Series system can be divided into conceptual ‘zones’, as follows:
• System Input Zone: DL251 Audio System I/O, DL351 Modular I/O, DL431 Mic
Splitter or DL451 Modular I/O/AES3 inputs, which are normally routed to input
channels. These inputs are primary system inputs and the control centre output
latency is measured relative to these inputs.
• Mix Zone: Aux outputs, return inputs and master/matrix direct inputs, which can be
freely patched to and from internal or external effects, while maintaining output
signal alignment.
• Output Zone: System outputs, that is, master and matrix outputs when Monitor
Mode (Align with Masters) option is switched off, or aux, master and matrix
outputs when it is switched on.
Aux direct inputs are fixed to the System Input Zone, so that system inputs that are
routed to an aux direct input will automatically line up with inputs routed to auxes via
input channels.
Return inputs and master and matrix direct inputs can be configured to operate in
either the System Input Zone (for example, as additional control centre inputs) or the
Mix Zone (for example, as effect returns) and are configurable on a per channel basis.
Examples of patches using the Mix Zone that are all fully compensated when the Send-
FX-Return delay compensation is switched on are:
• Aux -> Internal/External Effect -> Return
• Aux -> Internal/External Effect -> Master Direct Input
• Aux -> Internal/External Effect -> Matrix Direct Input
For all system inputs — including insert return points — the actual location of the input
XLR is automatically compensated for, so an insert using I/O at the stage location will
produce the same latency as an insert at FOH.
Input channel direct outputs are simply a copy of the input channel output or mic input
signal, depending on the direct output mode for a particular channel. It is not possible
to delay these signals to line up with the main system outputs or aux outputs, so
patching from a direct output to an effect and back in to a return/master direct input
etc. cannot be fully compensated for.
The input to direct output latency depends on the direct output mode and input channel
insert delay compensation status according to the following table.
Master to matrix post-processing option
The signal path that feeds master bus signals onto matrix channels is fully compensated
for, so that signals fed directly 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.
You have a choice of tap-off point, so you can 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 (see Table 30 “Master and matrix tap-off
points”).
Direct Output mode
Input channel insert compensation (ms)
Off On
Pre-processing 0.76 0.76
Post-processing 1.073 2.188