Sub-Oscillator - Roland SH-1 Instruction Manual

SUB-OSCILLATOR
Sub-oscillator
The
sub-oscillator
is
actually a part of the
VCO
and
generates
a
pitch
one- or
two-
octaves
lower than
that of the
VCO.
Three
types
of
waves
are available: a
one-
octave lower square wave,
a
two-octave
lower square
wave and
a
two-octave lower
pulse
wave.
Mixing the
sub-oscillator output with the
VCO
output
will
give
new
dimensions
to
your
sound,
as
if
two VCO's
were
used.
Figure
(1
}
shows
the
combination
of
a
PWM
wave from
the
VCO
and
a
one-
octave lower square wave,
which can be
used to synthesize
accordion or organ
sounds.
Figure
(2)
shows
the
combination
of a
square
wave from
the
VCO
and
a
two-octave
lower square wave,
which can be used
to
synthesize
vibraphone sounds.
Figure
(3)
shows the combination of
a
pulse
wave
from
the
VCO
and
a
two-octave
lower pulse wave,
which
produces very
heavy sounds
suited
for rock music and
effective forad-!ib
performance.
The
correct
adjustment
of the
AUDIO
MIXER
controls
is
very important
since
the sound
will
vary greatly
with
different
balances.
1.
1
OCT
DOWN
(ACCORDION,
ETC.
See page 34.
zFtFfcF
1
OCT
DOWN
2.
2
OCT
DOWN
(VIBRAPHONE,
ETC. See page
35.)
VCO
SUB
OSC
Jtftfutf-
..nnn
SQUARE WAVE
zF
T
bllF :
2
OCT
DOWN
rU
Y
MIXED
WAVE
MIX)
*
AUDIO MIXER
O
'
VCO OSC WISE
SO
3.
2
OCT
DOWN
(VERY
HEAVY SOUND
FOR ROCK.
See page
37.)
JtMJLb
J]
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VCO
PWM WAVE
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2
OCT
DOWN
n
I
MIXED
WAVE
MIX)
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