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MODIFYING EFFECT
PARAMETERS
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The
LFO
Block
The
FM
Sound
Synthesizer unit has
one
LFO,
which
applies to
all
voices.
Each
voice has
its
own
preset
LFO
parameters
which modulate
the
voice,
yet those can be modified
to create
your
own
degree of modulation.
Wave
(Waveform)
The
shape
of the
LFO
waveform
determines
how
pitch
and/or
volume
are varied.
There
are
four
different
waveform
shapes
which
can be
selected,
as
shown
in
the
diagram below.
LFO
WAVEFORMS
(0)
Sawtooth waveform
(1)
Square
waveform
(2)
Triangular
waveform
(3)
Sample
&
hold
waveform
AM
Speed
(LFO
Frequency)
This
sets
the speed, or
frequency
of the
waveform,
within an
approximate
range
of
0.008Hz
to
53Hz.
The
greater
the speed, the
faster
the
rate
of
modulation.
PMD
(Pitch
Modulation Depth)
This
sets
the
amount
of
LFO
modulation
available
in
relation to pitch.
The
range
of pitch variation
is
from 0
to 127,
with
0 producing no
pitch
change and 127
producing
maximum
pitch
change
potential.
AMD
(Amplitude Modulation Depth)
This
sets
the
amount
of
LFO
modulation
available
in
relation
to
volume.
The
range of variation
is
from 0
to
1
27.
Modifying
LFO
Parameters
(Hz)
(LFO
speed
of
the display screen
:
0 ~-255)
The
modulation
sensitivity
valves for
each
voice
determine
how much
that voice
is
affected
by
the
LFO.
All
parameters
in
the
LFO
Block
are
equally applied
to
the
POLY
and
MONO
voices.
Notice
that
in
the Poly
and
Mono
blocks, there are
settings for
pitch
modulation
sensitivity
(PMS) and amplitude modulation
sensitivity
(AMS). These
are
used
in
conjuction with the
PMD
and
AMD
para-
meters
to
determine
the
actual
degree of modulation.
Although
the
distinction
between depth and
sensitivity
is
not
great,
it
is
important
to
understand
is
terms
of using these
parameters
effectively.
AMS
PMS
-
32
-
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