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I)
VC01
O
OCTAVE
This control has three
settings, 16'. 8'
and
4'.
At
the
8' setting,
the
middle
A
on
the
keyboard produces
A440
(with
Tune
control
set
properly).
16'
and
4'
settings
produce sound one
octave lower
and
one
octave
higher, respectively.
The
Keyboard
is
therefore
extended
to
the equivalent of
a
7 octave
range.
WAVEFORM
A.
Sawtooth
This
waveform
is
rich
in
both even and
odd
harmonic
overtones.
Because
of
this,
the
VCF
can be used
to
"shape"
the
tone
color over a very
wide
range
by
selec-
tively
emphasizing
different
harmonics
of
the
waveform
(sec
VCF
section
for
more
details).
Sawtooth waveforms
are
good
for
bass,
strings,
brass
and
many
other
sounds.
B.
PW/PWM
(Pulse
Width/Pulse
Width
Modulation)
These
settings
produce
various types
of rectangular
waveforms, such
as
square
waves, pulse waves, "chorus",
etc.,
de-
pending
on
the settings
of the
PW/PWM
and
PWM
SPEED
controls.
An
extremely
wide
range of
sounds
are available using
these controls.
•
PW
Waveform
The
width,
or
"duty
cycle"
of
the
VCO
waveform
may
be
varied
manually
using the
PW/PWM
control
(PWM SPEED
has
no
effect
in
this
position).
At
0,
the
VCO
waveform
is
square
wave (50%
duty
cycle),
and
possesses
the
typical dull
and
"hollow" sound
of the clarinet (only
odd
harmonies
are
present).
Advancing
the
PW/PWM
control
reduces the
duty
cycle,
and hence
the
width
of the
VCO
wave-
form. This
produces
a
dramatic
shift
in
the tone quality
towards
a brighter
and
more
"nasally"
sound
similar to
an
oboe
or harpsicord.
At
8
or
above
the pulse
width
becomes
so
narrow
as
to collapse,
which produces no sound and
in
effect
shuts
off
the
VCOs.
This
is
useful
when
the
VCFs
are
used
as
sound
sources
in
their
self
oscillating
mode.
•
PWM
Waveform
The width
of the
VCO
pulse
waveform
is
continuously changed,
or
"modulated"
by
a variable
speed
oscillator.
This creates
a
fat
"chorusing" type
of
sound,
similar
to
multiple
oscillators
due
to the
con-
stantly
shifting
harmonic
balance.
The
PW/PWM
control
now
determines
the
depth
of
the
effect.
At
0.
there
is
no
modulation
(constant
square wave).
Be-
tween
8
and
10,
modulation depth
is
so
great that the
VCO
shuts off
part of the
time
(because pulse/width
becomes
for
part
of
each
cycle).
The
speed
of the
effect
is
controlled
by
the
PWM
SPEED
knob.
The
PWM
oscillator
is
completely
I)
VC01
O
OCTAVE
(Oktaveneinsteliung)
Zur
Auswahl
der
16', 8'
Oder
4'
Oktave.
Je
kleiner die Zahl,
umso
hdher
der Ton.
WAVEFORM
(Wcllenform)
Dient
zur
Wahl
der Wellenform,
wel-
che
die
Grundklangfarbe bestimmt.
Sie
konnen wahlen
zwischen
(*•».
(Sagezahn),
PW
(Pulsbreite)
und
PWM
(Pulsbreiten-
modulation).
PW/PWM
Bei
der PW-Einstellung wird
die Puls-
weile
der Impulswelle bestimmt. Eine
O-
Stellung
des Knopfs
erzeugt eine
breite
Rechteckswelle,
die
bei
Rechtsdrehung
immer
enger
wird.
Bei
hdchster
Einstellung
(10)
ist
dann
nichts
mehr
zu hdren.
Die
PWM-Einstellung
dient
aufierdem
zur
Tiefenkontrolle
der Pulsbreitenmodulation.
Die Pulsbreiten
konnen
hier
modulierl wer-
den und
einen
"fetten"
Klang erzeugen.
O
PWM
SPEED
(PWM-Geschwindigkeit)
Hierdurch
laOt
sich die
Frequenz des
Modulalionszyklusses
beeinflussen.
Bei
langsamer Geschwindigkeit
entsteht
ein
Phasen-Sound,
wobei
durch
schnelle
Geschwindigkeit
ein
Chorus-Effekt
er-
reichtwird.
II)
VC02
Dieser
VCO
kann
in
Erganzung
zum
VC01
benutztwerden.
urn
dem
Klang
noch
mehr Volumen
zu
geben.
OCTAVE
Zur
Auswahl
der
VCO
2-Oktaven
stehen
16'. 8'
und
4'
in
Sagezahn-Wellenform
zur
Verfugung.
Bei einer
OFF-Position
wird die
Funktion
des
VCO
2 unterbrochen.
DETUNE
Die
Tonhoheneinstellung
des
VCO
2
kann
sich
leicht
von der
Tonhohe
des
VCO
1
abheben,
urn
einen
noch
volleren
Sound
zuerreichen.
I)
Oscillateurv.c.o.
1
(VC01)
O
OCTAVE
Permet de
choisir
les
octaves
16'. 8'.
4
.
Plus
le
chiffre est
petit et
plus
la
hauteur
du
sonestelevee.
WAVEFORM
Permet de
choisir
la
forme d'onde
qui
determinera
le
timbre
de
base.
Vous
avez
chois entre:ix (dents
de scie),PW(modula-
tion
par
impulsions)
et
"PWM
(modula
tion par
duree d'impulsions
variable)
PW
PWM
Ceci determine
la
largeur
des
impul-
sions
quand
la
forme d'onde
a
modulation
par
impulsions
a
largeur
variable
est
choisie.
Le
reglage
a
zero
(0)
produit
des
amplitudes
a
forme
rectangulaire.
Quand
le
bouton
est
tourne vers
le
haut,
la
largeur
des
impulsions diminue.
Aucun
son
n'est
produit sur
le
reglage
le
plus
eleve.
Quand
la
torme d'onde
PWM
est choisie,
le
meme
bouton
aiuste
la
profondeur
des
modulations
par
impulsions
de
largeur
variable.
En
position
"PWM".
la
largeur
des
impulsions
vane
par cycle
regulier
et
ceci
produit
un son
gras.
PWM
SPEED
Ajuste
la
frequence
du
cycle
de
modulation
quand
la
position
"PWM"
est
choisie.
Une
vitesse lente
permet
d'obtenir
un son
de
phase;
une
vitesse
rapide
per-
met
d'obtenir
un
effet
de
choeur.
II)
Oscillateurv.c.o.
(VCO
2)
II
peut
etre
utilise
avec
I'oscillateur
VCO
1
pour
renlorcer
le
son
delivre.
OCTAVE
Permet de
choisir
les
octaves
de
I'oscil-
lateur
VCO
2.
16',
8' et 4'
sont
toutes
des
tormes d'ondes en dents
de
scie.
Placer
sur
"OFF" quand
la
sortie
VCO
2
n'est
pas
utilisee.
DETUNE
Permet
-d'aiusler
umquement
la
hauteur
du son de
I'oscillateur
VCO
2.
Regler
ce
bouton pour
que
le
VCO
2
soit
legerement
plus
aigu
ou
plus
plat
que
le
VCO
1
de
facon a produire un son
plus epais.
separate
from
the
Delay
Vibrato/Joystick
Section, thus allowing vibrato
and
PWM
effects to
occur simultaneously.
PW/PWM
This controls the pulse
width
of
the
PW
waveform, and
the
modulation depth
of
the
PWM
waveform
(see
above).
O
PWM
SPEED
This controls the
speed
of the
modula-
tion
effect
in
the
PWM
waveform
(see
above).
It
has
no
effect
on
the
PW
waveform.
II)
VCO
2
This
can be used
with
VCO
1
to
add
extra
body
to
the
sound.
SCALE
For
selecting the
VCO
2
octave.
16
.
8
.
and
4
are
all
sawtooth waveforms. Set
to
OFF
when
you
do
not
want any
VCO
2
out-
put.
DETUNE
For ad|ustmg
VCO
2 pitch
only. Setting
this
knob so
that
VC02
is
only
slightly
sharp
or
flat
of
VC01
can be used
to
create
a
fatter
sound.
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