Roland JP-8080 Owner's Manual page 69

(Sawtooth wave)
This waveform is used for nearly all instruments except for
woodwinds. Many sounds unique to synthesizers can be
created using this waveform.
(Triangle wave)
This is a simple sound with few overtones. It is used for cre-
ating flute sounds etc.,
NOISE
By applying a LPF (low pass filter, p.73) to noise, many dif-
ferent "colors" of noise can be produced.
[1] CUTOFF FREQ:
Set the cutoff frequency of the LPF. As the knob is rotated to
the right, the noise will have more high frequency compo-
nents, and at the same time the volume will also increase.
(Rotating the knob to the left all the way may result in no
sound at all.)
Unlike NOISE for OSC 1, the cutoff frequency will not
change, regardless of the key that you play.
Level
Frequency
[2] RESONANCE:
This regulates the emphasis that is applied to the region at
the cutoff frequency. As the knob is rotated to the right, the
sound will have a greater sense of pitch. If the knob is rotat-
ed to the right all the way, a sine wave will result.
Level
Frequency
Characteristics for high values of RESONANCE
When RESONANCE=127, a sine wave will result, produc-
ing a pitched sound. At this time, setting CUTOFF
FREQ=64 will cause all keys to produce a pitch of C4. As
the CUTOFF FREQ value is changed in steps of one, the
pitch will change in semitone steps. You may find it conve-
nient to use the Edit Scope (p.64) to view the value as you
make settings.
changes in Cutoff Frequency
changes in Resonance
[SYNC] (Sync Switch)
This switches sync on/off. When this is on, the indicator
will light, and a complex sound with many overtones will
be produced. This is effective when the OSC2 pitch is higher
than the OSC 1 pitch.
Sync cause the output waveform of OSC 2 to be synchro-
nized to the output waveform of OSC 1. ("Functions using
OSC 1 and OSC 2" (p.73)). I.e., each time the OSC 1 wave-
form returns to the beginning of its period, OSC 2 will also
be forcibly reset to the beginning of its period, producing a
complex waveform.
OSC 1
OSC 2
* If the effect of Sync is difficult to notice, rotate [OSC
BALANCE] toward the right (toward OSC 2).
* Sync will not occur if NOISE is selected as the OSC 2
[WAVEFORM], or if [EXT] is on.
Tonal changes using Sync
If you turn [SYNC] on and modify [RANGE] or
[FINE/WIDE], the tone of OSC 2 will change in various
ways while the pitch remains the same.
[RANGE]
Specify the pitch of OSC 2 in relation to OSC 1 over a range
of +/-24 semitones (+/-2 octaves). As the knob is rotated
toward the right the pitch of OSC 2 will rise. As it is rotated
toward the left the pitch of OSC 2 will fall. With a setting of
0, OSC 2 will have the same pitch as OSC 1.
With settings of -WIDE or +WIDE, the [FINE/WIDE] knob
can adjust the pitch of OSC 2 over a +/-4 octave range.
However in this case, you must be sure to rotate the knob
fully right or left.
* To make it easy for you to make accurate settings, the -
24, -12, 0, +12 and +24 settings have a greater width than
other settings.
[FINE/WIDE] (Fine tune/Wide)
When the [RANGE] setting is -24– +24, this knob provides a
+/-50 cent (+/- 1/2 semitone) adjustment to the pitch speci-
fied by the [RANGE] setting. As this knob is rotated to the
right, the OSC 2 pitch will rise. As it is rotated to the left, the
OSC 2 pitch will fall. When this knob is in the center posi-
tion, the pitch will be as specified by the [RANGE] setting.
return to beginning
of period
69