Owner`s manual
UNCONDITIONAL
TUNING
("AUTO
TUNE")
It
is
possible
that,
after
warm-up
and
stabilization,
the
two
audio
oscillators
in
The
Source
may
not
be
nominally
tuned
to
exact
unison.
A
procedure
to
correct
this
is
described
in
Tuning
Up,
on
page
3
.
This
procedure
involves
unconditional
access
to
oscillator
2
and
should
be
explained
further.
Simultaneously
touching
|8||t|2|g
and
|tggU
Level
connects
the
incremental
control
to
the
master
tuning
input
for
Osc
2.
Turning
the
incremental
control
will
adjust
the
tuning
of
Osc
2,
relative
to
Osc
1,
without
changing
the
stored
values
for
Osc
2
interval
for
each
voice.
The
range
of
adjustment
in
this
mode
is
approximately
1
semitone.
The
factory
programs
are
voiced
with
careful
attention
to
the
tuning
of
Osc
2.
Osc
2
is
generally
tuned
to
some
consonant
interval
—
an
octave,
a
major
tenth,
etc.
These
interval
values
are
set
in
memory
on
the
assumption
that
Osc
1
and
Osc
2
are
tuned
as
close
to
exact
unison
as
possible.
A
general
tuning
procedure
is
described
in
the
Troubleshooting
Section
beginning
on
page
53.
THE
INCREMENTAL
CONTROL
The
incremental
control
is
the
most
important
single
control
on
The
Source.
It
controls
the
settings
of
all
variable
parameters,
and
determines
the
rate
of
operation
for
most
Level
2
functions.
Its
operation
should
be
thoroughly
understood.
The
incrementer
is
a
freely-turning
opto-electronic
controller.
An
optical
sensor
notes
a
change
from
light
to
dark,
which
is
generated
by
passing
spaced
bars
through
the sensor
(as
shown
in
the
figure
below).
There
are
120
opaque
bars
on
the
transparent
incrementer,
allowing
240
changes
of
status.
(LIGHT
SOURCE/
LIGHT
SENSOR
MECHANISM)
46