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266 Chapter 22 ES2
• LFO 1 is polyphonic, which means that if used for any modulation of multiple voices,
they will not be phase-locked. Furthermore, LFO 1 is key-synced: Each time you hit a
key, the LFO 1 of this voice is started from zero. To explain, when used on polyphonic
input (a chord played on the keyboard) the modulation is independent for each
voice (note). Where the pitch of one voice may rise, the pitch of another voice might
fall and the pitch of a third voice may reach its minimum value.
• LFO 2 is monophonic, which means, that the pitch of all voices will rise and fall
synchronously, if you modulated the Pitch123 target with the LFO2 source, for
example.
Both LFO’s feature a number of waveforms. LFO 1 can fade in or out automatically,
without the need to engage a separate envelope generator. The LFO parameters are
detailed below:
EG (LFO1)
At its center position—which can be accessed by clicking the middle mark—the
modulation intensity is static: it won’t be faded in or out at all. At positive values, it is
faded in. The higher the value, the longer the delay time is. At negative values, it is
faded out. The lower (onscreen) the slider is positioned, the shorter the fade out time is.
The function is abbreviated as EG because the fading in or out is internally performed
by an ultra-simple Envelope Generator.
Note: Chaotic and fast modulations of the oscillator(s) frequencies (Pitch123) by LFO 1
with a delayed Sample&Hold selected as the waveform, a high Rate, and short fade out,
make the attack phase of the note sound Moog “Rogue-ish”—and quite similar to the
attack phase of brass instruments.
Note: Most commonly, this is used for delayed vibrato—many instrumentalists and
singers intonate longer notes this way. To set up a delayed vibrato: Place the slider at a
position in the upper half (Delay) and modulate the Pitch123 target with the LFO1
source. Set a slight modulation intensity. Select a Rate of about 5 Hz and the triangular
wave as the LFO waveform.