ALLEN & HEATH ML5000 User's Guide download pdf (Page 38)

38 ML5000 User Guide

K VCA GROUPS

VCA Groups Explained

VCA groups provide an important alternative to

audio su/jointfilesconvert/424790/bgroups for simultaneously controlling the

level of more than one channel using a single fader.

Unlike an audio su/jointfilesconvert/424790/bgroup the signal is not routed

through the group fader itself. Instead, you route

the signal directly to the main output. The VCA

group fader sends a DC voltage to remotely control

the assigned channel levels, so providing the group

control. This is possible because each channel has

a pre-pan VCA (voltage controlled amplifier) which

can be controlled by both the channel fader and

group faders. This means that all post-fade outputs

from assigned channels will be affected by the VCA

master faders. Note that the channel pre-fade

(monitor) sends are not affected by VCA groups.

Note that the channel fader always controls the

signal level. If the channel is assigned to one or

more VCA groups then both the channel and the

group faders control the level as if they were in

series. Refer to the diagrams over the page.

The ML5000 has 8 VCA groups. Mono and stereo

input channels can be assigned to one or more

groups. The VCA group assignments can be stored

as part of the console snapshot memory system.

This can be disabled if you want the snapshots to

control the mutes only.

The benefits of VCA grouping

Effects balance is maintained. Because the

channel post-fade sends are affected, the reverb

level returned elsewhere in the console also follows

the group fader movements.

Stereo groups on one fader. Because the level is

controlled before the channel pan circuit, a single

VCA group fader is all that is required to control a

stereo or LCR group. This would take 2 or 3 faders

using audio groups if the channel pan image is to

be maintained.

Multiple output control. The relative balance

between all outputs is maintained when moving

VCA group faders.

Multi-level grouping. A channel can be assigned

to more than one VCA group. This lets you assign

multi-level groups, or even a ‘grand master’,

impossible with audio groups.

Conventional audio groups are still useful when you

need to insert a signal processor such as a

compressor to affect a group of signals, or you need

to feed different groups of signals into the matrix.

However, fewer such groups are usually required

on a VCA equipped console. For this reason the

ML5000 provides the mode switching to reconfigure

unused audio groups as full featured aux sends.

PAFLPAFLPAFLPAFLPAFLPAFLPAFLPAFL

SAFE

SAFE SAFE SAFE SAFE SAFE SAFE SAFE

EDIT

GROUP

SELECT GROUP TO EDIT

MUTE

NOM

ASSIGN USING CH MUTES

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ALLEN & HEATH ML5000 User's Guide Page 38

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