8
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
7.3
R
estaurant/
S
ports
B
ar
S
ystem:
I
n
this
application,
a
v
ariety
of
line
le
v
el
audio
signals
(
tape,
C
D
,
satellite
b
ac
k
ground
music
and
TV)
are
fed
into
line
inputs
fi
v
e
through
eight.
T
alent
mics
are
fed
into
inputs
three
and
four.
A
host
paging
mic
is
fed
into
input
2
w
hich
w
ill
duc
k (
attenuate
)
three
through
eight.
A
n
emergency
paging
mic
is
fed
into
input
one
and
channel
one
priority
is
internally
selected.
A
n
emergency
page
signal
w
ill
then
fully
attenuate
all
other
inputs.
I
nputs
one
through
four
should
all
ha
v
e
their
Stereo/Mono
s
w
itches
pushed
in.
T
he
Mono
output
is
fed
into
an
e
x
isting
mic
mi
x
er/
PA
amplifier.
T
he
Mono
output
Mic/
L
ine
s
w
itch
should
b
e
pushed
in
to
gi
v
e
a
mic-le
v
el
output
to
this
e
x
isting
mic
mi
x
er.
Talent Mics
On
Ch.
2
-
4
(Mono
Switch
In)
Stereo
Speakers
DVD/CD
Player
Satellite
B
ackground
Music
Stereo
Power
Amplifier
T
ape
Satellite
T
V
Audio
H
ost
Mic
(Ducking)
E
mergency
Page
(Priority
Ducking)
Outdoor
Loudspeaker
Output
8.
TROUBLESHOOTING
TIPS
8.1
N
o
S
ound
Chec
k
the
A
C
po
w
er.
I
s
the
po
w
er
s
w
itch
on
and
illuminated
?
Chec
k
the
le
v
el
meters.
I
f
they
are
operating,
the
pro
b
lem
b
et
w
een
the
mi
x
er
and
the
later
components
in
the
system.
I
f
not,
chec
k
to
see
you
really
ha
v
e
an
input
signal
and
that
it
is
on
the
desired
channel.
Chec
k
that
you
ha
v
e
the
master
gain
controls
at
the
desired
operating
le
v
el.
8.2
D
istorted
S
ound
Something
is
b
eing
o
v
erdri
v
en
in
the
signal
path.
I
f
the
clip
indicators
are
acti
v
e,
reduce
the
channel
le
v
el
con-
trols.
I
f
the
clip
indicators
are
still
acti
v
e,
reduce
the
input
signal
le
v
el.
I
f
the
le
v
el
meters
are
constantly
in
the
red,
reduce
the
Master
gain
and
increase
the
gain
of
components
follo
w
ing
the
mi
x
er.
T
here
are
many
gain
ad
j
ustments
in
the
mi
x
er
itself
and
pro
b
a
b
ly
se
v
eral
others
in
other
system
components
w
hich
ma
k
es
it
possi
b
le
to
o
v
erdri
v
e
an
input
section
and
then
incorrectly
try
to
reduce
the
gain
of
the
output
section.
T
he
b
est
w
ay
to
approach
setting
gains
is
to
esta
b
lish
the
operating
le
v
el
of
input
stages
first
b
y
setting
their
gain
as
high
as
possi
b
le
b
ut
lea
v
ing
a
b
out
20dB
of
headroom
for
loud
pea
k
s,
then
mo
v
e
on
to
set
the
master
gain
to
produce
a
good
meter
reading.
P
roceed
to
set
the
gain
of
e
q
uali
z
ers,
limiters,
crosso
v
ers,
and
amplifiers
follo
w
ing
the
mi
x
er
in
the
same
manner,
al
w
ays
w
or
k
ing
to
w
ard
the
later
stages
of
the
system.
8.3
E
xcessive
N
oise
I
f
the
noise
is
in
the
form
of
hiss,
the
pro
b
lem
is
usually
due
to
an
input
stage
set
up
for
lo
w
gain
and
then
compensating
b
y
increasing
the
master
gain.
T
urn
up
the
channel
le
v
el
controls
and
reduce
the
master
gain.
8.4
E
xcessive hum
T
his
is
usually
caused
b
y
"
ground
loops
"
in
the
system
w
iring.
A
comple
x
sound
system
w
ith
many
sources
separated
b
y
significant
distance
and
using
se
v
eral
po
w
er
outlets
has
many
opportunities
for
this
pro
b
lem
to
occur.
I
f
possi
b
le,
feed
e
v
erything
in
the
system
from
one
po
w
er
source
w
ith
a
common
ground.
I
f
you
need
help,
get
in
touch
w
ith
your
A
shly
dealer
or
call
an
A
shly
technical
ser
v
ice
representati
v
e
at
1-800-828-6308.