Owner's Manual

If
only wanting to record
guitar
then
this
2-channel
facility
can be used in a
similar
way. Only, in
this
instance, the
AMP
Ou
tp
ut
on the
front
panel is used to feed the
direct
instrument
signal back into the amplifier, and the
microphone
is used to record the
amplified
guitar. This way, the clean
direct
guitar
and the
amplified
guitar
can be recorded
on
separate
tracks
(see
diagram
3
in
the Signal
Connections section).
Monitoring
Options
ISA
One
offers
a
variety
of
monitoring
options
from
the PHONES section
on
the front panel.
If
want
ing to access
the
monitor ing
facility, connect a
pair
of headphones to the PHONES socket using
a%"
TRS Jack connector, then use
the
VOLUME
control to set the
level. There
are
two
basic
monitoring
modes, one
for
liste
ni
ng
to the
inputs
and one
for
listening
to a
monitor
mix sent to
ISA
One
from
a desk
or
si
milar
source. These modes
are
governed by
the
status
of the
CU
E MIX
switch,
as
fol
lows:
Default Mode
(CUE
MIX
switch inactive/not
lit)
The signal sent to the headphones is a fix
ed
mix
of
all
inputs, e.g. the main
mic
/l
i
ne/inst
input
and ei
th
er
the
01
instrument
signal
or
the
EXT
1/P
signal.
So,
if
a
microphone
is connected to the
rear
panel and selected
by
the
INPUT switch,
whilst
a
guitar
is plugged
into the
01
input
on
the
front
panel, a
mix
of the microphone signal and the
direct
guitar
will
be heard in the headphones.
Cue
Mix Mode
(CUE
MIX
switch active/lit)
Pressing the
CUE
MIX
button activates a mode
where
the
signal heard
in
the headphones is
that
connected to the
CUE
MIX 1/Ps
on the
rear
panel. This is a
useful
mode
if
using
ISA
One
with
a desk,
where
a
master
mix of backing
tra
cks and the signal being
recorded can
be
sent back to ISA
One
for
monitoring.
If
working in a
higher
latency
environment
such as
with
a
OAW,
th
e
default
mode
(CUE
MIX
s
wit
ch
in
active) can be us
ed
to create a latency
fre
e
monitor
mix, as described below.
Creating a latency-free monitor mix with a
DAW
The default mode described above can
be
used to create a l
atency-free
monitor
mix
if
using
ISA
One
with
a
OAW,
where
attempting
to
monitor
the sig
na
l being recorded
aft
er
sending
through
t
he
ho
st
creates
timi
ng
problems
. In
this situation, a mono
master
mix
from
y
ou
r music s
oftware
can be
sent
to
ISA
One
by connecting the le
ft
or
righ
t
output
of
your
sound
ca
rd
or
interfac
e to t
he
EXT
1/P
on the re
ar
panel. This signal
will
replace the
01
input on the
front
panel as the second
input
sent
to
monitoring
and to the
AOC
(if
installed). A mix of the main
mi
c
/line/inst
input and
th
e EXT
1/P
(both panned centrally)
ca
n
th
en
be
listened to
on
the headphones
(with the
CUE
MIX
switch
inactive)
for
latency-free
monitor
in
g.
See
diagram
2 in
the
Signal Connections section
for
more
details.
Applications
Mic
Preamp
Input Impedance
A
maJ
or
element
of the sound of a mic pre is related to
the
int
eraction between
the
sp
ec
ific
microp
hone being u
se
d and the type of
mi
c preamp
inter
face technology
it
is connected to. The
ma
in
area
in
which this
interaction
ha
s an eff
ec
t is the level and
fre
quency
response of the
microphon
e, as f
ol
lows:
Level
Professional microphones tend to have low output impedances and so
more
level
ca
n be achieved by sel
ec
ting
th
e higher
im
pedance
po
sit
ions of
th
e
ISA
One
mi
c
pr
ea
mp.
Frequency response
Micr ophones
with
defined
pr
esen
ce
peaks a
nd
tailored
fr
eq uency res
po
nses can
be
fu"rther enhanced by choos
in
g low
er
im
pedan
ce
se
ttings
. Choosing higher
input
impedance va
lues
will
tend to emphasise the high
fr
equency response of the microphone connected,
a
llowing
you to get
improv
ed ambie
nt
information
and high end
clarity,
even
fr
om average- pe
rform
an
ce
microphones. Various
microphone
/I
SA
One
preamp impedan
ce
co
mbinations can
be
tried
to achieve the des
ir
ed
amount of
co
l
ourat
ion
for
the ins
trum
ent
or
voi
ce
be
ing
recor
de
d.
To unde
rs
tand how to use the
imp
edance selection crea
tiv
e
ly,
it
may be use
ful
to r
ea
d the
follow
ing
sect
ion
on how the microphone o
utput
impedance and
th
e
mi
c
pr
ea
mp
input
impedan
ce
i
nt
eract.
16