Contour Amount; The Contour Generators - Moog MEMORYMOOG 345 Owner's And Service Manual

\^
Playing a scale
on
the
keyboard
with different
amounts
of
keyboard
voltage
will
show you
audibly
just
how
changing
the control voltage
amount
affects
the
FILTER. The
intonation
will
change
as
you
vary
the
amount
of
voltage
from
the
keyboard.
Full
keyboard
voltage should
yield a
normal tempered
scale.
Experiment
with
moving
the
CUTOFF
control while
you
Ve playing the
FILTER.
Also, notice the
effect
of running
NOISE
into the
FILTER
when
the
EMPHASIS
amount
is
up to the point of
oscillation
and
the
keyboard
is
controlling
it:
you
get
tuned
NOISE.
CONTOUR AMOUNT
The
CONTOUR AMOUNT
control
(8.4) is
simply an attenuator
for the control voltage
generated by
the
FILTER^s
CONTOUR GENERATOR
(8.5),
which
gets
applied to the
CUTOFF
frequency.
Going back
to the basic
patch
weVe
been
working
with, you*ll notice that
it*s
possible to
mimic
the
effect
of the
CUT-
OFF
control with the
CONTOUR AMOUNT
control.
CONTOUR AMOUNT
CONTROLS
u
OSCILLATORS
OCTAVE
Ni/.
WAVESHAPE
• • •
D D D n
1
TH3
m n
7
\^
0^
^00
ru
A
PULSE WIDTH
1%)
OCTAVE WAVESHAPE
• • •
ill
I
II II
\
J^/
0^5^
^
C^^I I I
ill
I
I
OCTAVE WAVESHAPE
• • •
D D D
i%3$'''ea
ii
n
n
#
FHEQUEHCY PULSE
WDTH
(%)
V
\^
2
I
^/^
10
LEVEL
10
LEVEL
2 8
To
2 8
VOLTAGE
CONTROLLED
FILTER
]
KB TRACK
• •
V3
2/3
-3—
3
2
B
o-
-5 5
CUTOFF
EMPHASIS
CONTOUR AMOUNT
700
]
1J
1.4 ;
3
^\l//
1.4
f
3
100
6
200—
12
2—
8
200—
12
10-^ \\9
»//
i-,.
^/^
«^4
\^,.
1MSEC 10 SEC
2 MSEC 20 SEC
10
2
MSEC
20 SEC
ATTACK DECAY SUSTAIN RELEASE
•
• • •
-o-
-Ch
-D-
RETURN UNCONDITIONAL KEYBOARD
RELEASE
TO ZERO
CONTOUR FOLLOW
700
1
1.S
1.4
f
3
^\t//
1.4
2 3
-^\I//S
100
— —
200 12
2
8
200—
12
..-i
\^' »^/ ^,.
^/^
"^4 \^»
1
MSEC
10 SEC 2
MSEC 20 SEC
10 2
MSEC
20
SEC
ATTACK
DECAY
SUSTAIN RELEASE
u
HOLD A LOW
NOTE.
MOVE
THE
CONTOUR AMOUNT CONTROL. NOTICE THAT
WITH THESE SETTINGS,
IT
HAS THE SAME EFFECT AS THE CUTOFF CONTROL.
Changing
the
settings
of the
CONTOUR
controls
(8.5) will
have
a
noticeable
effect
on
this.
To
understand what's happening,
you
have to understand
what
the
CONTOUR GENERATORS
do.
THE
CONTOUR GENERATORS
As was
explained
in
the section
on
the keyboard,
when you
play a note, a trigger
signal
is
generated
by
the
keyboard which
is
channeled
to the
CONTOUR GENERATORS
(8.5
and
9.0).
It
is
this trigger
signal
which
tells
the
CONTOUR GENERATORS
to
start
up.
Once
triggered,
the
CONTOUR
GENER-
ATORS
put out
a
dynamic
control voltage
—
one
that varies across time.
When
this
voltage
is
applied to
the
CUTOFF
control of the
FILTER,
you
get
dynamic changes
in
timbre.
When
it*s
applied to the
VOLTAGE-CONTROLLED
AMPLIFIER
(9.0),
you
get
dynamic
changes
in
loudness.
KEY DEPRESSED
^ATTACK
1
DECAY
KEY RELEASED
RELEASE
CUTOFF FREQUENCY
OR LOUDNESS
TIME
KEY
IS
HELD DOWN
33