Casio CZ-1000 Operation Manual page 17

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The
following
is
a
brief
explanation
of
the various parts
of
Fig.
1.
©Digital
Controlled
Oscillators
(DCO
1,
DCO
2)
The
Digital
Controlled
Oscillators
correspond
to
the
VCOs
(Voltage Controlled
Oscillators)
used
in
analog
synthesizers.
As
parameters, the
DCOs
have
Wave Form and
Envelope Generator
parameters.
These
parameters
select
the basic
wave form (Wave Form) and
control the
changes
in
pitch
over
time
after
a
key has
been
pressed.
As shown
in
Fig.
a,
you
can
choose from 8
kinds
of
basic
wave forms
(from
SAW-TOOTH
to
RESONANCE)
as
well
as
being
able
to
combine
any two*
of
these
wave forms
to
create
wave
forms such
as those
shown
in Fig.
b.
This
means
that altogether,
you
have
a selection of
33
wave forms
to
choose from
according
to
the
sound you want
to create.
(Fig. a)
K
'IT_
3
A_
.
AA
SAW-TOOTH
SQUARE
PULSE
DOUBLE
SINE
5.
(\-
6
nitons
7
jiIl
SAW-
PULSE
RESONANCE
I
RESONANCE
II
RESONANCE
III
(SAW-TOOTH)
(TRIANGLE)
(TRAPEZOID)
(Fig. b)
KTL
rLk.-
combination
of
saw-tooth
and
square waves
combination
of
saw-pulse
and
resonance
I
waves
Except
the
resonance wave forms
from
6
to
8,
which cannot be combined.
The change
of pitch
over
time
is
controlled
by
the
envelope
generator.
This
means
that
the
pitch
changes
according
to
the
rate (slope)
and
level
(final
level in
a
step) that
have
been
set
for
each
step.
P
(Pitch)
*
At
the
End
Point
Ls,
the
level
becomes
0.
R3
L
3
\
|\R«
SUSTAIN
Point
!
Key
ON
Key
OFF
|
t
(time)
END
Point
-16-

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