PULSE WIDTH knob:
Adjusts the harmonic content of the pulse wave by setting its
duty cycle from approximately 1 to 99%. A 50% duty-cycle
pulse (having only
odd
harmonics), also
called a square wave,
can be
obtained by setting the knob
to
approximately
5, then carefully adjusting for the dropout of
the second harmonic
(the
first octave over
tone). This knob is only effective if the PULSE SHAPE switch is on. At
the extreme knob settings the
pulses will "thin out" until they degenerate to dc,
resulting in no audio output.
This knob has no effect on the sawtooth or triangle waves.
7-2
OSCILLATOR B
OSC
B
is
identical
to OSC A, except instead of the 5YNC switch there is a FINE knob,
OSC B can also be a POLY-MOD
modulation source. It can't be modulated by_ POLY-
MOD.
OSCILLATOR B
4
1
8
*
T
•
A
A
IT
10
MWOUEPJCV FINE
SHAPE
«
7
•
10
PULSi WIDTH
Figure
7-2
FINE knob: Raises OSC B frequency
up to one semitone. This
allows detuning the
oscillators,
typically, for a warmer, more
natural sound.
7-3
GLIDE
4
7
«
10
GLIDE
Figure 7-3
GLIDE knob: When
set to the KEYBOARD CV, which
controls oscillator pitch,
instantly steps between
notes. As the GLIDE knob
is
advanced,
the CV does not step
between the notes,
but begins to "slew." This introduces
"portamento" between notes.
See also pages
3-4
and
3-5.
7-t*
CM600A 12/82
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