FIGURE P r
H
S, I fl S D
RESOW/U*CE
slider about h^tf way up and try the
same experiment. Hotic«
bow the
noise now takes on
a whistling quality. This pitch-like
whistling is caused
by
the resonance of the filter. Remnance
emphasizes
a
narrow band of frettuendes just at
the filter cutoff
fr«{Ufincy. The more resonance you add, the more
emphasis, and
consequently the
more pitched the
sound becomes.
Lower the
noise
shder and
listen
again
to
the
VCO
sawtooth wave. Again move the VCF FREQ
control
up and down slowly with different settings of the
RESONANCE control,
Notice
that when the
resonance
is
between the
1/2 and 3/4
marlis
you
can
actually hear the individual harmonics of the sound as
you slowly sweep the VCF FREQ up and down.
If
you
leave the
RESONANCE
coflttol about
half
way up, and sweep the VCF FREQ up and
down,
you
can
preate
a
"wow" type
of sounnj. Leave the VCF
FREQ control all the way down and
raise the
red
ADSR
slider under the VCF all the way up. When
you hit a key on
the keyboard,
the
ADSR
ENVELOPE GENERATOR produces a signal
which
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