Yamaha CS-50 Instruction Manual page 26

i
22
[301
VCF LEVEL
-(Gray)
This
slider
determines
how
much
o* the
sound
generated by the
VCO
then
pro-
cessed
by
the
VCF
will
be introduced to the
VCA.
^0
(down)
shuts off
all
sound
from the
VCF, and ?10
(upl
feeds
maximum VCF
output to the
VCA.
[31]
SINE
WAVE -
(Gray) This slider
determines how
much
of the pure, unfiltered sine
wave
generated by
the
VCO
will
be introduced to the
VCA.
In fact, this
slider
may
be used together with the
VCF LEVEL
slider
to
mix
pure
sine
wave with whatever
sound
is
coming from
the
VCF.
[25-29)
VCF ENVELOPE
GENERATOR -
Volume
is
not the only thing that can change
when you
play
a
note; the tone
may
also
change.
When you
pluck a
guitar string, for
example, the sound
starts
out
brilliant
and becomes
more mellow
as
the note
dies out.
To
duplicate
this effect,
it
is
often desirable to
change
both
the filter characteristics
and
the
volume
with
envelopes.
The
VCF
envelope
is
similar to
the
VCA
envelope
IADSR), but
it
affects the tone rather than the
volume.
Also, instead of
ADSR
sliders,
the
VCF
envelope has
IMITIAL
LEVEL.
ATTACK
LEVEL,
ATTACK
TIME.
DECAY
TIME
and
RELASE TIME
sliders
(IL-AL-AD-R,.
In
essence, the
VCF
envelope automatically
moves
the
HPF
and
LPF
sliders
each time
you
play
a
note,
thus changing
the
filter
cutoff
and
the
amount
of
harmonics and/or fundamental frequency you
hear.
The
exact
effect
of
this
envelope depends
entirely
on
the
actual settings of
HPF
and LPF,
as
well as
RESH
and RESL.
NOTE: To
hear
what
the
VCF
envelope controls do
as
you
read the following
descriptions,
begin by
setting
up the programming
PANEL
as illustrated to the right.
No
pure
sine
wave;
maximum sound from
VCF
enters the
VCA.
~~
No
sound
(torn
VCF;
—
pure sine wave
enters the
VCA.
Blend
of sine
wave
—
and sound from
VCF
_
enters th«
VCA.
Siring about
to be plucked
a
t»~ <no>nanti
Low
lime
.
.-.
.
-
.i
TT
1
1251
INITIAL
LEVEL
-
(Black)
With IL
set at
O
(down)
there
is
no
effect.
Moving
I
L up
to
—5
and then
playing
a
note
causes the
sound
to start
out "mellow"
(more fundamental and
less
harmonics) and
to then
move
into the
sound
you have
set
with
HPF
and LPF
sliders.
It is
as
though
you began by moving the
HPF
and
LPF
sliders a
bit
lower and
then
moved
them up
together
as
you
play the note until they
teach the "steady"
setting.
Play a
note with the
controls as
below.
What you hear
is
equivalent
to
this
Equivalent to
IL
Attack lime
—I—
—
When
you
first
hit
the
key
When
you've been
holding
the
key