Reference Manual
CHAPTER 22. LIVE INSTRUMENT REFERENCE 342
The phase of each oscillator can be adjusted using the Phase control in its display.
As explained earlier oscillators can modulate each other when set up to do so with the
global display's algorithms. Oscillator D can also modulate itself, via the Feedback param-
eter available in its display. When an oscillator is modulating another oscillator, two main
properties dene the result: the amplitude of the modulating oscillator and the frequency
ratio between both oscillators.
22.6.3 LFO Section
Operator's LFO
Parameters.
The LFO in Operator can practically be thought of as a fth oscillator. It runs at audio rates,
and it modulates the frequency of the other oscillators. It is possible to switch modulation by
the LFO on or off for each individual oscillator (and the lter) using the Destination buttons
in the LFO's display. The LFO can also be turned off if it is unused.
The LFO offers a choice of classic LFO waveforms, sample and hold (S&H), and noise.
Sample and hold uses random numbers chosen at the rate of the LFO, creating the random
steps useful for typical retro-futuristic sci- sounds. The noise waveform is simply bandpass-
ltered noise.
Tip: FM synthesis can be used to create fantastic percussion sounds, and using the LFO
with the noise waveform is the key to great hi-hats and snares.
The frequency of the LFO is determined by the LFO Rate control in the shell, as well as the
low/high setting of the adjacent LFO Range switch. The frequency of the LFO can follow