User Manual

CHAPTER 23. LIVE INSTRUMENT REFERENCE 354
The Shape chooser selects the oscillator's waveform. The choices are sine, sawtooth, rectan-
gular and white noise. When rectangular is selected, the Pulse Width parameter is enabled
in the display, which allows you to change the pulse width of the waveform. Low Width
values result in a very narrow waveform, which tends to sound tinny or pinched. At 100%,
the waveform is a perfect square, resulting in only odd harmonics. The pulse width can also
be modulated by an LFO, via the slider next to Width. Note that this parameter is only
enabled when the corresponding LFO is enabled.
The Octave, Semi and Detune knobs in the shell function as coarse and ne tuners. Oc-
tave transposes the oscillator by octaves, while Semi transposes up or down in semitone
increments. The Detune knob adjusts in increments of one cent (up to a maximum of three
semitones (300 cents) up or down).
Oscillator pitch can be modulated according to the settings of the Pitch Mod and Pitch Env
parameters in the display. The LFO slider sets the amount that the LFO modulates pitch.
Again, this parameter is only enabled if the LFO is on. The Key slider controls how much
the oscillator tuning is adjusted by changes in MIDI note pitch. The default value of 100%
means that the oscillator will conform to a conventional equal tempered scale. Higher or
lower values change the amount of space between the notes on the keyboard. At 0%, the
oscillator is not modulated by note pitch at all. To get a sense of how this works, try leaving
one of the oscillators at 100% and setting the other's Key scaling to something just slightly
different. Then play scales near middle C. Since C3 will always trigger the same frequency
regardless of the Key value, the oscillators will get farther out of tune with each other the
farther away from C3 you play.
The Pitch Env settings apply a ramp that modulates the oscillator's pitch over time. Initial
sets the starting pitch of the oscillator while Time adjusts how long it will take for the pitch
to glide to its nal value. You can adjust both parameters via the sliders or by adjusting the
breakpoints in the envelope display.
The Sub/Sync parameters in the display allow you to apply either a sub-oscillator or a hard
synchronization mode. When the Mode chooser is set to Sub, the Level slider sets the
output level of an additional oscillator, tuned an octave below the main oscillator. The
sub-oscillator produces a square wave when the main oscillator's Shape control is set to
rectangle or sawtooth and a sine wave when the main oscillator is set to sine. Note that the
sub-oscillator is disabled when the main oscillator's Shape is set to white noise.
When the Mode chooser is set to Sync, the oscillator's waveform is restarted by an internal