MOTU 4pre, Руководство пользователя

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Quick Ref
e
re
nc
e:
4pr
e
F
ron
t P
a
nel
1.
Th
ese four P
recision Digital
Tr
im™ r
otar
y enc
oders
pr
ovide triple-func
tion c
on
tr
ol o
ver the trim lev
el,
mix
volume
, and pan of the XLR/TRS c
ombo jacks on the r
ear
panel.
P
ush the MIX knob (2) r
epea
tedly t
o c
ycle among
the four separ
at
e mix
es and trim mode
. T
he LEDs (11)
indica
te
the curr
en
t mix,
or trim mode
. W
hen a mix is
ac
tiv
e,
push and hold the MIX k
nob t
o t
oggle bet
w
een
volume and pan c
on
tr
ol,
as indica
te
d b
y the LEDs (11).
W
hen in trim mode
, use the knob and input le
ve
l met
ers
(7) t
o calibr
at
e the input signal le
ve
l. T
hese knobs
pr
ovide +60 dB and +22 dB of boost
, r
espec
tiv
ely
, for
the mic (XLR) and instr
umen
t (
TRS) input jacks
. A
djust-
men
t can be made in appr
ox
ima
tely 1
dB incr
emen
ts.
All
four jacks ha
ve
pr
eamps
, so y
ou can plug in just about
an
ything:
a micr
ophone
, a guitar or e
ven a syn
th.
F
or +4
dB signals
, push the knob (1) t
o engage the -20 dB pad
.
Fo
r the XLR mic input
, push and hold the k
nob t
o t
oggle
48V phan
to
m po
w
er
.
W
hen in mix mode
, use the knob t
o c
on
tr
ol the jack’
s
input v
olume or pan (as indica
te
d b
y the LEDs
, 11) for
the curr
en
tly selec
ted mix.
2.
Th
is multi-func
tion knob c
on
tr
ols v
olume of the 4pr
e’
s
four mix busses (11).
P
ush the knob r
epea
tedly t
o c
ycle
among the four mix busses
, as indica
te
d b
y the LEDs
(11).
W
hen a mix is ac
tiv
e,
push and hold the
VO
L knob
to
to
ggle the individual channel k
nobs (1,2,3,
and 4)
bet
w
een v
olume and pan c
on
tr
ol,
as indica
te
d b
y the
“pan
” LED (11),
wher
e on is pan and off is v
olume
.
3.
Tu
rn the MAIN k
nob t
o c
on
tr
ol the main outs and the
headphone jack belo
w the knob
, which mirr
ors the main
outs.
4.
Tu
rn the PHONES k
nob t
o c
on
tr
ol the headphone jack
volume belo
w it.
W
hen po
w
er is off
, push the PHONES
knob t
o po
w
er on the 4pr
e;
push and hold t
o turn it off
.
W
hen c
onnec
ted t
o the c
omput
er via F
ire
W
ire
, the 4pr
e
is po
w
er
ed b
y its F
ire
W
ire
c
onnec
tion.
W
hen c
onnec
ted
via USB
, it must be po
w
er
ed with the included DC po
w
er
adapt
er
.
5.
Th
ese eigh
t LEDs indica
te
whether the -20 dB pad or 48V
phan
to
m po
w
er is enabled or disabled f
or the c
orr
e-
sponding mic input (1).
6.
Th
e “line out
” LEDs pr
ovide signal ac
tivit
y on line outputs
3 and 4.
7.
Th
e four input met
ers pr
ovide fiv
e-segmen
t met
ering for
the mic inputs
, r
anging fr
om -42 dB t
o -1 dB
.
8.
Th
e MAIN OUT met
ers pr
ovide t
en-segmen
t ladder LED
met
ering for the st
er
eo main outputs
, r
anging fr
om
-42 dB t
o clip
.
9.
Indica
te
s the curr
en
t oper
at
ional sample r
at
e.
10.
The S/PDIF ac
tivit
y LEDs indica
te
signal pr
esenc
e for
input and output
.
11.
The Mix LEDs indica
te
wha
t is being c
on
tr
olled b
y the
mix/trim knobs (1 and 2).
P
ush the MIX knob (2) r
epea
t-
edly t
o c
ycle among the f
our separ
at
e mix
es and trim
mode
. W
hen a mix is ac
tiv
e,
the knobs c
on
tr
ol input
lev
els for the curr
en
t mix.
P
ush and hold the MIX k
nob
(2) t
o t
oggle bet
w
een v
olume and pan c
on
tr
ol (pan LED
off and on,
re
spec
tiv
ely).
W
hen trim mode is selec
ted
, the knobs c
on
tr
ol input
trim lev
els.
12.
This is a standar
d quar
te
r-inch st
er
eo headphone jack.
Fr
om the fac
tor
y, it oper
at
es as its o
w
n output pair
. But it
can be pr
ogr
ammed t
o mirr
or an
y other output pair
(digital or analog).
S
ee “Phones Assign
” on page 34.
U
se
the v
olume knob abo
ve
to
c
on
tr
ol its le
ve
l.
2
1
10
3
4
5
6
7
8
9
11
12