Transcript No Slide Title

Fairmont Park
Baptist Church
Technical Support Ministry
Yamaha MC 2404 Training Program
In order to understand how to run the board you
MUST
understand how the audio chain works.
However don’t let this frighten you … its just like going from
Texas to California ... it begins with knowing the route you
need to take to get there.
Once you start the car, you can follow the route.
So lets get started
What is the audio chain?
The audio chain is every step of the process that is
necessary to get the sound from the source to the
speakers. It is imperative that in order to properly route
the signal to where you need it, (like getting from Texas to
California), you must know where it’s coming from and
where it’s going.
The
Overview
The “Board”
The “Board”
The board has 24 inputs. Each input represents a microphone,
instrument, etc etc.
Each input can be assigned to;
•
up to two monitor sends (FB1 & FB2) each having a
master send
•
up to two auxiliary sends Echo 1 & 2 each having a
master send
•
up to 4 sub groups (although you will only use one) (S1-4)
Each sub-group is then assigned to stereo left.
Stereo right is used as a third FB send for special occasions
Moving on to the
fun stuff . . .
“ Running the
Board “
Remember … I mentioned
that running a sound system
is much like a trip to
California.
Well here’s how we get
from Texas to California
Board
design
The
Input
Section
The “Input channel”
Each input channel consists of a:
20 db pad
Gain control
Hi EQ
Mid EQ with parametric sweep
Lo EQ
FB1 & FB2 sends
Echo 1 & 2 sends
Sub group assignments
Pan control
Channel cue button
Mute button
Volume fader
20 db Pad
This is used to CUT or remove
part of the input signal …
right off the top before you
do anything else. This is
useful for inputs such as tape
decks, CDs, guitars,
keyboards and signal
processors.
Gain
This is used to increase or
decrease the amount of signal
coming into the input channel
of the board.
This is useful for getting the
correct “gain structure” on
the inputs.
More on gain structure later.
A quick
word about
EQ
You will encounter two types of EQ.
Shelving & Parametric
It is imperative that you understand how a parametric
EQ works but we will discuss this in more detail later.
Channel EQ
Hi EQ - This is a
shelving control and is
used to add or cut hi
frequencies to that
channel.
Channel EQ
Mid EQ - This is a
parametric control. The
add / cut is based upon
the frequency that the
parametric control is set
at.
Channel EQ
Lo EQ - This is also a
shelving control and is used
to add or cut lo
frequencies to that
channel.
FB1 & FB2
Raising or lowering the FB1 or FB2
control raises or lowers the
amount of signal sent to the FB1 &
FB2 busses (outputs).
These are pre fade – pre EQ.
What that means is changing the
EQ controls will not make any
tonal changes in the monitors and
the output is not affected by the
fader position.
FB1 is the front stage monitors
FB2 is the band monitors.
ECHO 1 & 2
(AKA EFX, FX, Reverb)
This raises the
amount of signal being
sent to the FX1 &
FX2 busses.
Echo 1 & 2 are post
fade and post EQ.
What this means is
that the amount of
signal being sent to
Echo 1 & 2 busses will
change as the fader is
raised and lowered.
Group Assignments
& Pan
Each channel can be assigned to
any of the four busses by
pressing either the 1-2 or 3-4
button down and panning to the
left or right.
Panning to the center will assign
it to both 1 & 2 or 3-4 or all four
if both buttons are depressed.
Or to 1 & 3 or 2 & 4 by pressing
both and panning left or right.
Channel Cue
This is so you can monitor
the signal coming into the
channel.
Channel mute
The red button will turn the
channel on and off.
In the off position it will
mute all outputs off the
channel.
Channel fader
The fader will raise and lower
the volume of the channel.
FOH Master section
Echo return
(AKA … FX … EFX … Reverb)
We are not using the echo returns
but instead bring our effects unit
back into a normal input channel.
This gives us greater control over
the tonal range and assignments of
the reverb to where we want it.
FOH Master section
Group Out
At the present time we are not using
any of the group outs off this board.
Group outs can be used for any
number of things such as recording
or auxiliary monitors sends to
nursery or hallways.
FOH Master section
Group Pan
Group pan is used to assign whatever
has been assigned to that sub-group
to either the Stereo L-R outputs.
Since we are running mono you only
need to know that we pan everything
to the left.
FOH Master section
Group Cue
The group cue is used to
monitor the mix of what has
been assigned to that subgroup.
FOH Master section
Group On/Off
This is used to turn the sub
group on & off. This will not
affect any monitor or effect
(echo) sends.
FOH Master section
Group Fader
This is used to control the
amount of volume from the sub
group to the main outputs.
This will not affect any
monitor or effect (echo)
sends.
FB Outputs
The FB outs are a
“master” volume
control for how
much of the Echo
1 & 2 busses are
being sent to the
amplifiers and
speakers.
FB Cue
These are for you
to monitor the
mix you have
going to the
amplifiers and
speakers
Echo (FX) 1
Output
The FX outs are a
“master” volume
control for how much
of the FX1 buss is
being sent to the
reverb unit.
Echo (FX) 1
Cue
This is so you can
monitor what is being
sent to the reverb
unit.
Echo (FX) 2
Output
In our set up, Echo 2
is actually being used
as our record buss.
The signal goes from
Echo 2 to the bottom
(record) Yamaha tape
deck
Echo (FX) 2
Cue
This is so you can
monitor what is being
sent to the record
deck.