Applications For The Matrix - ALLEN & HEATH GL3800 User Manual

EXT EXT EXT EXT
IN IN IN IN
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OO OO OO OO
GRP GRP GRP GRP
1 1 1 1
OO +6 OO +6 OO +6 OO
GRP GRP GRP GRP
2 2 2 2
+6 +6 +6
OO OO OO OO
GRP GRP GRP GRP
3 3 3 3
+6 +6 +6
OO OO OO OO
GRP GRP GRP GRP
4 4 4 4
OO +6 OO +6 OO +6 OO
GRP GRP GRP GRP
5 5 5 5
+6 +6 +6
OO OO OO OO
GRP GRP GRP GRP
6 6 6 6
+6 +6 +6
OO OO OO OO
GRP GRP GRP GRP
7 7 7 7
+6 +6 +6
OO OO OO OO
GRP GRP GRP GRP
8 8 8 8
+6 +6 +6
OO OO OO OO
L L L L
OO +6 OO +6 OO +6 OO
R R R R
+6 +6 +6
OO OO OO OO
M M M M
OO +6 OO +6 OO +6 OO
LEVEL LEVEL LEVEL LEVEL
+6 +6 +6
OO OO OO OO
MUTE MUTE MUTE MUTE
OSC/NOISE
MIN MAX
PINK NOISE
1kHz OSC
ON
M
L-R
Talkback
MTX1-2
and
MTX3-4
alignment
AUX
1-2
AUX
MONITOR
3-4
AUX
5-8
0 10
AUX
9-10 M
LATCH
L-R
TALK
2TRK
MTX1
STEREO
MTX2
Stereo
monitoring
MTX3
STEREO
MTX4
AUX
9-10
MONITOR
30

Applications for the Matrix

mixer', a versatile toolbox of outputs you can use to satisfy a host of
applications. Each of the 4 outputs is mixed from any combination of
the groups, L, R, M and an external input as dialled up on the 12
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source rotaries (hence a '12x4' matrix).
adjusted independently. Using combinations of the outputs you can
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create mono, stereo or multiple output mixes.
include:
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Mono Recording
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combine L and R into a matrix output to produce a mono mix feeding
a recorder, video camera and so on. Raise the L and R rotaries to the
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2 o'clock position to sum them together. You can use the built-in
1kHz tone generator to feed a line-up tone to the connected recorder.
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Stereo Recording
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matrix, R in another to create a stereo pair that follows the LR mix.
You can adjust the balance to compensate for the acoustic sound in
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the room using the groups, and even add audience ambience
(described later).
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Remote Broadcast
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above. Use the tone generator to send a 'slate' signal to the
destination for line-up.
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Zone Feeds Send independent relay feeds to additional locations
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such as the foyer, dressing rooms, cry room, balcony and so on. You
can use the groups to adjust the balance to suit the destination, for
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example to boost the orchestra against the vocals. Feed the output
through an EQ to tune the speaker for the local acoustics.
Delay Fill Speakers Use the matrix to feed additional fill speakers for
distributing the sound more evenly around a large venue, for example
centre fill, stage front fills, under balcony or rear fills, or 'mix island'
delay tower at a festival. To aid intelligibility for the nearby listeners
without moving their focus from the stage, the send should be delayed
using an in-line delay processor. As a rule of thumb, delay 1mS per
foot difference between the listener and the fill and the listener and the
main speakers. Now add a few milliseconds 'Haas effect' delay so the
listener hears the main speakers slightly before the fill. Keep the fill
level about 10dB or so below the main PA sound at that location. It
may help intelligibility to boost the vocals above the instruments in the
fills, and to use an EQ to cut the extreme LF and HF frequencies.
Hearing Assist
hard-of-hearing inductive loop, IR or wireless broadcast for the hearing
impaired audience. The matrix is ideal for this application as you can
combine a stereo LR mix into mono, add groups to help vocal
intelligibility, patch in an external ambience source, and add
processing such as EQ and limiters which may be needed.
Additional Monitor Mixes
additional monitor mixes when you run out of auxes, this time made
up from a mix of the groups, LR and external input. The LR could be
used to create a general overall balance, and then the groups added
according to musician preference. Groups could be routed from 'me
only' channels associated with each musician, or traditionally grouped
sources. The musician could get a balance from, say, the overall
stereo mix, drums, brass, keyboards, 'me only' and ambience, a very
quick way of mixing. You could also use the EXT IN to add ambience
pickup, very useful if you are creating in-ear (IEM) mixes. Use two
matrices to create stereo monitor feeds.
Combining Two Consoles into a Single PA
you may have a support band wishing to patch in their own console.
One way to do this is to feed the PA from a pair of matrices, and then
use EXT Inputs to combine the external console with the main LR mix.
The matrix is a 'mixer within a
If you are working with a stereo PA you can
Raise L to the unity 3 o'clock position in one
Create a mono or stereo feed as described
It is a growing requirement that venues provide a
You can use the matrix to create some
Its master level can be
Some applications
In a festival situation
GL3800 User Guide