58
For
of
course, as you
discovered earlier, each
of the
five wave-
forms
available
from
the
VCO's has its
own timbre, even without
fil-
tering. And
this is the
place
to
experiment
with each
one of them, fol-
lowing
more
or less
the
same
procedure
as
we outlined
for
the
sawtooth
above. You
will discover
among other things that
1
)
the
square wave has only odd
harmonics: fundamental,
twelfth,
third above the second octave,
flat seventh above
the second
octave, and
so
on, representing the first,
third,
fifth,
seventh harmonics and
the others
in
the same series.
2)
the
sine
wave
has no
harmonics: the
filter output will
peak once, at
the frequency of the
sine wave,
and at
no
other frequencies.
3)
The harmonic
structure of
the
pulse
wave depends on the
width
of the pulse.
Square
Pulse
5.1072 It would be a good idea too to
perform
a few other experi-
ments to familiarize yourself thoroughly
with
the action of
the VCF
and with
its
timbre-control possibilities. We outline them briefly here
Initial Oscillator Frequency
CM
it
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