Casio CZ-5000 - Page 26

|
e
VCA
(Voltage
Controlled
Amplifier)
|
This
circuit
controls
the
volume
of
the
sound
created
by
the
VCO
and
VCF.
Determines
the
Determines
Determines
the
volume
pitch
of
the
sound,
the
timbre.
of
the
sound.
(Output)
VCO
VCF
VCA
WwW
5
Keyboard
re
Sound
signal
,
Control
signal
ie
a
ie
a
a
_————
=
-
LFO
Gate
signal
Oscillator
used
for
modulation
Determines
the
Envelope
curve
of
the
waves
e
EG
(Envelope
Generator)
Controls
the
change
over
time
of
the
volume,
timbre
etc.;
in
other
words
the
envelopes.
The
basic
envelope
curve
Consists
of
the
four
elements
shown
in
the
diagram
below
which
can
be
controlled
independently.
The
EG
block
is
thus
Capable
of
creating
a
great
variety
of
curves.
|
|
Release |
Sustain
level
e
LFO
(Low
Frequency
Oscillator)
As
this
term
indicates,
the
LFO
is
an
oscillator
Operating
at
low
frequencies.
It
can
be
used
to
contro]
Various
other
blocks
to
create
such
effects
as
vibrato.
Remember
|
The
basic
structure
and
functions
of
an
analog
synthesizer:
al
|
*
VCO:
Determines
Ditch
(basic
waveform)
®
EG:
Determines
the
envelope
|
©
VCF:
Creates
the
timbre
©
LFO:
Used
for
various
effects
©
VCA:
Determines
sound
volume
Note
The
above
is
meant
Only
as
a
general
idea
of
how
an
analog
synthesizer
works.
Of
course,
there
are
considerable
differences
according
to
the
manufacturer
and
model.