Roland JUNO-60 - Page 15

13
Waveform
Setting
o
181
Waveform
n\t
Saw
Tooth
mir
Square
JUU
Pulse
Description
The sawtooth
wave
contains
a
fundamental
sine wave
and
its integral
harmonic
sine
waves at
a
fixed
ratio. The
level
of each
harmonic is as
shown on the
right.
When
fundamental content is 1,
the
content of nth
harmonic
isl/n.
The square
wave contains a
fundamental sine
wave and
its
odd
numbered harmonics
at a
fixed ratio. The
level
of
each
harmonic
is the
same
as
sawtooth
wave:
the
content
of nth harmonic
is 1/h;
except that
there are no
even
numbered
harmonics.
With pulse
wave,
the
har-
monic content greatly
varies
depending on the pulse
width. It is
characterized by
a
lack
of the nth harmonic
series
when the pulse
width
is 1/n.
The
example
on
the
left lacks
3rd, 6th, and 9th
harmonics because
the pulse
width
is
1/3
(33%).
Harmonic
Content
£-j
TTTT-r-t
F2345678
JQ n n
F 3 5 7
PULSE WIDTH
at 33% (1/3)
m n-,
F 2
4 5
7 8
Square
wave one
octave
lower than
the
DCO's
(
|
|_|
)
Pulse Width
Manual PWM
PWM
MODE SWITCH
©
MAN
PULSE
WIDTH Determine the Pulse width.
50S5
FLTLTb
PWM
by
LFO
PULSE MODE
SWITCH
©
+
LFO
PULSE
WIDTH MODULATION
(3)
>
Adjusts the
intensity
of
the modu-
lation.
LFO
SIGNAL
OUTPUT
WAVE-
FORM
nnnnnnn
PWM by
ENV
PWM MODE
SWITCH
(2)
+
ENV
PULSE
WIDTH
MODULATION
®-+
Adjusts
the
intensity of the
modu-
lation.
ENV
SIGNAL
OUTPUT
WAVE-
FORM
=ii§=
nnnnnnn
101
^2