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Chapter 9 EXS24 mkII 181
EXS24 mkII LFOs
EXS24 mkII LFO overview
EXS24 mkII includes three LFOs (low frequency oscillators). They are all available as sources and
targets in the router. If you are new to synthesizers and the concept behind LFOs, see Common
modulation sources on page 489.
LFO 1 is polyphonic, which means that if it is used for any modulation of multiple voices, they
will not be phase-locked. LFO 1 is also key-synced—each time you play a key, LFO 1 modulation
of this voice is started from 0.
To understand the non-phase-locked characteristic more fully, imagine a scenario where a chord
is played on the keyboard. If LFO 1 is used to modulate pitch, for example, the pitch of one voice
might rise, the pitch of another voice might fall, and the pitch of a third voice might reach its
minimum value. As you can see, the modulation is independent for each voice, or note.
The key sync feature ensures that the LFO waveform cycle always starts from 0, which results in
consistent modulation of each voice. If the LFO waveform cycles were not synchronized in this
way, individual note modulations would be uneven.
LFO 1 can also be faded in or out automatically, courtesy of a built-in envelope generator.
LFO 2 is monophonic, which means that the modulation is identical for all voices. For example,
imagine that a chord is played on the keyboard. If LFO 2 is used to modulate pitch, the pitch of
all voices in the played chord rises and falls synchronously.
LFO 3 is also monophonic, always using a triangular waveform.
All three LFOs can either oscillate freely or be synchronized to the host application tempo in
values ranging between 32 bars and 1/128 triplets.
LFO parameters
•
LFO 1 EG knob: Rotate to set the time it takes for LFO 1 modulation to fade in or fade out (see
Use EXS24 mkII’s LFO 1 envelope generator on page 183).
•
LFO 1 Rate knob: Rotate to set the frequency—the speed—of LFO 1 modulation. The value is
displayed in Hertz (Hz) or note values beneath the slider. See Set EXS24 mkII’s LFO rate.
•
Wave buttons: Choose the waveform for LFO 1 (left column) and LFO 2 (right column). For
details about how to use them, see EXS24 mkII LFO waveforms on page 182.
•
LFO 2 Rate knob: Rotate to set the frequency—the speed—of LFO 2 modulation.
•
LFO 3 Rate knob: Rotate to set the frequency—the speed—of LFO 3 modulation.