Owner's Manual

Cue mix
Activating the
CUE
MIX
button sends the signal connected to the
rear
panel
CUE
MIX
INPUTS
to the headphones. When in cue
mix
mode,
no
inputs can
be
heard in the headphones. This facility means that, in a
low
latency environment, a
monitor
mix c
an
be
fed
from
a desk into ISA
One
to provide a suitable cue
mix
for
the recording
artist.
Although
ISA
One
has
no
monitor
mixing capabilities,
there
is one method that allows an engineer
working
in
a higher latency
environment
!with
a
DAW]
to create a blend of inputs and outputs
for
headphones. The
EXT
1/P
connector on the
rear
panel provides
an
input
for
a mono signal, intended
primarily
to gain access to the second input channel
on
the opt
io
nal
ADC
card, but also offering
some
monitoring
functionality.
One
channel of a
master
mix
can
be
sent
from
music
software
!via an audio interface
or
sound card]
to the
external
input
!EXT
IPI
of
ISA
One,
which
will
then
be
panned centrally, along
with
the
mic/li
n
e/inst
input signal and sent to the
headphones. Note
that
the
CUE
MIX
button should
be
inactive in
this
mode.
For
more
information
on
cr
eating a cue mix in a
higher
latency environment, read the Monitoring Options section.
Metering
ISA One's
front
panel offers a
variety
of metering options so that the levels of any inputs can
be
viewed. A
traditional
movin
g-coil
VU
meter
provides
an
average level reading
for
the main input
signal[whatever
is selected
by
the
INPUT
switch]. Meanwhile, to the
right, two
vertical
L
ED
meters
display the
pe
ak level of the same
signal[that
selected
by
the
INPUT
switch)
on
the
left
meter, and
either
an
instrument
connected to the
DIINPUT
or
the
signal
received at the
EXT
1
/P
on
the
right
meter. The signals shown by the
LED
meters
relate
to the
two
signals being sent to the optional
ADC,
if
installed. These signals def
au
lt to the main
mic/
line/
inst
input
and the
Dl
input, respectively, but become the main
mic/line/inst
input and the
external
input
if
a signal is connected to the
EXT
1/P
socket
on
the
rear
panel.
There are
two
states
for
the
VU
meter
and the
left
LED meter, set
by
the
POST
INSERT
s
witch
:
Default mode
With the
POST
INSERT
switch inactive !not lit), the signal displayed
on
the
VU
meter
and the
left
LED
m
eter
is the ma in
mic/
line/inst
signal selected
by
the
INPUT
switch,
just
after
the
input
ci
rcuitry
[gain, phase, high-pass
filter
etc.)
bu
t before the
Inser
t.
This is the
signal sent to the MAIN
0/P
and cha
nnel1
of the optional
AD
C [if installed). when the
INSERT
swit
ch on the
front
pa
nel is
no
t active
!not lit].
Post
Insert
mode
With the
POST
INSERT
switch active
!lit),
the signal displayed
on
the
VU
meter
and
the
left
LED meter is the signal received at the
INSERT
RETURN socket on the r
ea
r panel. This is the s
ignal
sent to the
MAIN
0/P
and channe
l1
of t
he
optional
ADC
[if
install
ed],
when the
INSERT
switch
on
the front panel is active [lit]. Use
this
mode when
you
are sending the main
mic/line/in
st
signal to an
external processor, via the.
IN
SER
T
SEND and RETURN, before re
turning
to the
I
SA
On
e for
monit
or
i
ng
or
con
ver
sion.
Calibration
Both the
VU
meter
and the
LED
meters
ca
n be
ca
librat
ed using the two corresponding
dials
on the rear pane
l[see
the Rear
Panel
section
for
the exact location]. This
allow
s a
more
suitable range
for
the meters, so
that
the signal bei
ng
recorded can be dis
pl
ayed
in
an
appro
pri
ate way. A
low
level signal, for exam
pl
e,
will
not dis
pl
ay much ac
tivity
on the meter
s,
wh
ic
h
ca
n be r
ec
tifi
ed
by
reducing the dBu level represented
by
OVU
IVU
m
eter
) o r
OdBFS
!LED meters]. The meters are
ca
lib
rated in the fo
ll
owing way:
VU
Meter
If
wanting to
calibrate
the
VU
met
er
, the
VU
CAL sw itch on
th
e
front
panel must f
ir
st
be activated. Once the
VU
CAL switch has
be
en
pr
essed and is lit, the
VU
METER
CAL
dial
on
the
rear
panel
ca
n
be
rotated to
cha
nge the dBu level r
ep
resented
by
OVU.
In
de
fault
mode,
with
the
VU
CAL switch inactive !not lit),
OVU
is equal to +4dBu. Activati
ng
th
e
VU
CAL
s
wit
ch
allows
the
VU
M
ETE
R
CAL
dial
to
set a new value
for
OVU
fr
om +
11
dBu
!fully
anti
clockwis
e) to +
26
dBu [f
ully
clockw
ise].
Th
ere is a centre detent
in
the
VU MET
ER
CAL
dial, at which
OVU
is equal to
+22
dBu.
LED
Meters
If
wanting to
ca
librat
e the L
ED
meters, the
PEAK
METER
CAL
dial
on
the r
ea
r
pan
el can be use
d.
In
the defa
ult
state,
with
the
dial
in
a
ce
ntr
a
l[
'detented')
po
sition,
OdBFS
is
eq
u
al
to
+2
2
d8u
.
Ro
tating the
dial
in eit
her
dir
ection
sets
a new value
for
OdBFS
from
+18dBu
[fully
anticlockwise) to +26d8u
[fully
clockwise].
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