Yamaha CS-15 Owner's Manual page 18

applications
HOW
TO CREATE THE
TRUMPET SOUND
VCO
1
Setting
Set
waveform
to
|\
.
FEET
selecting
range
to
16'. Set
LFO
MOD
knob
fully to 0.
Usually the
LFO
controls
are
used
for finishing
touches
after the basic
sounds have been
made
with
VCF
and
VCA.
The
positions of the
PW
and
PWM
switches
do not
matter.
These
are
used only
when
[~L_
is
selected as
waveform.
MIXER
1
Setting
Sends
the
signals
selected
in
VCO
1
to
VCF.
Other knobs
including the
MIXER
2
must be
all
fully
turned
down.
HI 50
'
N
9D
LFO
MOD
'""
PW
VCF
1
Setting
Set the
filter
mode
to
LPF.
Set the
CUT OFF
FREQ
knob
fully
to
H. This
is
to feed the
whole
spectrum of
the
N
waves including the highest
har-
monics
to the
VCA.
With
the
RESONANCE
and
LFO
knobs
turned
fully
left,
set
the
EG
selector
switch to
EG
1
+.
EG DEPTH
is
set to
0.
VCA
1
Setting
With
EG
selector
switch
set
to
EG
1,
turn the
EG
DEPTH
to fully
right.
Set
INITIAL LEVEL,
LFO
MOD
to
0.
Thus,
EG
1
alone determines changes
in
volume.
EG
1
Setting
With
the
EXT/KBD
switch
set
to
KBD,
raise
the
SUSTAIN
control.
Set
the
NORMAL/TIME
X
5
switch to
NORMAL.
This produces
an envelope
shaped
J
L.
Set the output
volume
as required.
©
FIRST
STEP
-VCF
In
this
condition,
a
melody
can be played
on
the
keys.
But
to
produce
the tonal quality
of
the
trum-
pet requires
another
step,
operation
of
the
CUT
OFF FREQ
knob. While playing the
keyboard, turn
the
CUT OFF FREQ
knob
slowly to the
left.
This will
give
you
a gradually
lowering cut-off frequency,
causing the
harmonics
at a
high range to
be cut off
and
tones to
become
softer.
When
the
knob
is
at a
position
somewhat
left
from
center,
you
will
be able
to
obtain
sound approximating that
of
a
trumpet.
This adjustment
is
to
be continued until
roughly
satis-
factory results
are obtained.
Note:
Is
the
BRILLIANCE
control
on
the
left
of
the
keyboard
set as
shown below? Operate
this
control
too.
With
the switch
set
to
VCO
1,
if
the control
is
moved
up and down,
the
tones
become
hard
or soft like
the effect of
the
CUT OFF FREQ
knob.
•S
LFO
MOD
EG
DEPTH
SECOND
STEP
-EG
The sound
has
been
made
to resemble
that
of the
trumpet with help of the
VCF,
but
it still
has
no
ex-
pression.
This
is
because
the
EG
1
so
far
was
used
only to
raise
the
SUSTAIN LEVEL.
It
is
necessary
to
study
the
EG
1
setting
more
in detail to
come
still
closer to the characteristics of the trumpet.
As
the
trumpet
is
not an electronic instrument,
it
does not
produce
a certain,
constant
volume and sound
every
time
it is
played.
The
characteristics
of
the instru-
ment
are
displayed
on
the
attack
of
the
sound.
Though
this
is
only instantaneous,
something
like
the
sound of
a
musical instrument cannot be generated
without
its
reproduction.
The
sound
of
the
trumpet
^