About The Vca Functionality - Yamaha M3000A Owner's Manual

About the VCA functionality

The VCA master section of the M3000A contains eight
VCA master faders. These VCA master faders 1–8 can
be used to control the overall input level of input
channels assigned to the corresponding VCA groups
1–8.
MIX 1/2 MIX 3/4 MIX 5/6
10 10 10
VCA VCA VCA
MUTE MUTE MUTE
5 5 5
0 0 0
NOMINAL NOMINAL NOMINAL
5 5 5
10 10 10
20 20 20
30 30 30
40 40 40
50 50 50
60 60 60
If you wish to use the VCA functionality, set the rear
panel VCA MASTER/SLAVE switch to the MASTER
position.
Basic function of the VCA master fad-
ers
The VCA master faders control the gain of the pre-
fader signal of input channels which are assigned to
the corresponding VCA group. The following diagram
shows the flow of audio signals and control signals
(CV) when input channel 1 is assigned to VCA group
1.
CH1
FADER
VCA
INPUT 1
CH 1
VCA GROUP SW 1
VCA MASTER
FADER 1
• The gain of an input channel which is assigned to a
VCA group can be controlled both by the channel
fader and by the VCA master fader. For example if the
channel fader is set to 0 dB and the VCA master fader
is set to –10 dB, the gain will be 0 dB + (–10 dB) = –10
dB.
• When you operate a VCA master fader, it will affect all
MIX buses (except for MIX buses set to pre-fader),
matrix, and STEREO bus to which a signal is being
sent from the corresponding channel.
• When a VCA master fader is in the 0 dB position (the
NOMINAL indicator of that fader will be lit) it is in
unity gain, and that VCA will produce no boost or cut.
38
MIX 7/8 MIX 9/10 MIX 11/12 MIX 13/14
10 10 10 10
VCA VCA VCA VCA
MUTE MUTE MUTE MUTE
5 5 5 5
0 0 0 0
NOMINAL NOMINAL NOMINAL NOMINAL
5 5 5 5
10 10 10 10
20 20 20 20
30 30 30 30
40 40 40 40
50 50 50 50
60 60 60 60
Audio signals
Control signals
MIX
MATRIX
STEREO
• When the VCA MUTE switch of a VCA master fader is
turned on (the indicator beside the switch will be lit),
no control signal will be sent from that VCA master
fader, and the post-fader signal of input channels
assigned to that VCA group will be muted.
MIX 15/16 S
Using a single VCA master fader to
10
control multiple channels
VCA
MUTE
5
0
NOMINAL If two or more channels are assigned to the same VCA
5
group, you can use a single VCA master fader to con-
10
trol them. The following diagram shows an example
20
30 of the signal flow when VCA GROUP select switch 1 is
40
turned on for input channels 1, 5, and 16.
50
60
INPUT 1
CH 1
VCA GROUP SW 1
INPUT 5
CH 5
VCA GROUP SW 1
INPUT 16
CH 16
VCA GROUP SW 1
OUT
• If two or more input channels are assigned to a VCA
OUT
group, the gain of each channel can be controlled both
by the channel fader and by the VCA master fader.
OUT
• When you operate a VCA master fader, it will affect all
MIX buses (except for MIX buses set to pre-fader),
matrix, and STEREO buses to which the input chan-
nel assigned to that VCA group is being sent.
• When a VCA master fader is in the 0 dB position (the
NOMINAL indicator of that fader will be lit) it is in
unity gain, and that VCA will produce no boost or cut.
• When the VCA MUTE switch of a VCA master fader is
turned on (the indicator beside the switch will be lit),
the post-fader signal of all input channels assigned to
that VCA group will be muted.
Audio signals
Control signals
CH1
FADER
OUT
VCA
CH5
FADER
OUT
VCA
CH16
FADER
VCA
OUT
VCA MASTER
FADER 1