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pressed.
(b)
R2 (Rate
2):
the time it takes to
reach Level
2
pitch from Level
1.
(c)
?,3
(Rate
3):
the time it takes to
reach Level
3
pitch from Level2.
(d)
K4 (Rate 4):
the
tiir.e
it
takes
to
reach Level
4
pitch after
a
key
is
released.
(e)
LI
(Level
1):
the initial pitch
when
a
key is pressed.
(f)
L2
(Level
2):
an interneciate pitch
betv/een
Level
1
and Level
3.
(g)
L3
(Level
3):
The sustain pitch
maintained while
a
key is held.
(h)
L4
(Level
4):
The pitch returned
to
after
a
key is released,
*
For the
RATE paremeters,
99 is
the
fastest and
the slowest,
*
For the
LEVEL parameters,
50
corresponds
to
standard keyboard pitch,
is -4
octaves, and
S9 is +4
octaves.
*
When
the PITCH
EG is
not to
be
used,
LI—
L4
should
all be set to
50.
(The
initial voice data
is:
LI
—
L4=50,
Rl
—
R4-99).
^p.44
.
*
The PITCH
EG is
useful not only
for
}
creating musical instrument sounds, but
also
for
synthesizing
the sounds
of
animals, whistling,
or
any sound effect
that has
a
distinctive pitch variation.
Fig. 36.
DXl
Basic Pitch
EG
Pattern
ct
99
LI
A
13
50
T
.R2
.
/
Kj-
t
key on
\
/
key off
^^
ct
\
¥
L2
(11)
DISPLAY SELECT
**
:
EG/PITCH
EG
This
sv/itch deterir.ines
whether
the
LED
.display displays the values
of
the
EG or
'pitch eg
parameters.
*
EG
parameters
Rl
—
R4
and
Ll
—
L4
are all
displayed
in
numeric
(digital)
form,
A
bar
graph display also provides
a
grapnic indication
of
the
EG
curve.
*
The bar
graph has scales
for both
amplitude
(-dB)
and cents
(pitch.
100
cents
=
semitone).
The cents scale for
the PITCH EG is
printed
to the
left
of
the bar graph,
and the amplitude scale
for the EG is
printeo
to the right
of
the bar
graph
(fig.
53)
Fig. 37.
EG
LED Display
Pitch
EG
^^^ graph display
ot
levels 1-4.
unit
D
display
Z
"'"'
(cent).
;a
T
^WASSV
JM
JHH
1^394l97iig6.^_0
H^\
Unit display
used by
EG
i(-dB),
*
The position
of the
display select
switch can not
be
stored
in
memory.
KEYBOARD SCALING
(fig.
36)
The high and low frequency ranges
of
acoustic
instruments generally
do
not have the same
level
or
tiir.bre
envelope.
This balance
between
the
low and high frequency range
envelopes has been developed over literally
centuries, and that is why the sound
of
an
acoustic instrument
is
so
pleasing
to the
ear.
The DXl
KEYBOARD SCALING function
allov/s
synthesizing this kind
of
envelope
variation.
A
natural, pleasing overall
response can
be
produced
by
varying
the way
in
which
the EG is
applied
at
different
f
recjuencies.
The
KEYBOARD
SCALIIiG
feature
has two functions
—
LEVEL SCALING and RATE
SCALING,
Fig. 38.
Keyboard Scaling Section
OUIPUI
I
Frtl
^CAl
IN(j
DiPIH
CUHVf
fo.nr
...
..
CUR^
DEPTH
J
1
1
1
I
I
I
®
<&
®
®
LEVEL SaiLING
(fig.
39)
This function varies
the EG
level according
to the key
played.
Since this
can be
applied
to each
operator individually,
it can be
used
to
control level and timbre.
The LEVEL
SCALING function has
5
parameters, permitting
creation
of
a
broad variety
of
scaling
characteristics.
The
5
parameters
are:
(a)
BREAK POINT:
This sets
the key
which
is to be
the center
point
of
the
scaling curve.
(b)
LEFT CURVE:
This sets the level
scaling curve to
the
left
of
the
BREAK
POINT.
(c)
RIGHT
CURVE:
This sets the level
curve to the right
of
the
BREAK
POINT,
(d)
LEFT DEPTH:
This sets the depth
of
the
scaling effect
to the
left
of
the
BREAK
POINT.
Fig. 39.
Level Scaling
LOW
A-t
BREAK
POINT
C
HIGH
Fig. 40.
L
KEY
SCALE
R
KEY SCALE
Simulated Keyboard Split with Level
Scaling
CO
C3
0P1
MUK
POMT
63
0P4
MUX
POMT
25
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