9

Table Of Contents
CommentsWaveform
Use of the rectangular waves will periodically switch the LFO
between two values. The upper rectangular wave switches between
a positive value and zero. The lower wave switches between a
positive and a negative value set to the same amount above/below
zero.An interesting effect you may want to try out is achieved by
modulating the Pitch destination with a suitable modulation
intensity that leads to an interval of a fifth. Choose the upper
rectangular wave to do so.
Rectangle
The two lower waveform settings of the LFOs output random values.
A random value is selected at regular intervals, as defined by the
LFO rate. The upper waveform steps between randomized values
(rapid switches between values). At its lower setting, the random
wave is smoothed out, resulting in fluid changes to values. The term
Sample & Hold (S & H) refers to the procedure of taking samples
from a noise signal at regular intervals. The values of these samples
are then held until the next sample is taken.Tip: A random
modulation of Pitch leads to an effect commonly referred to as a
random pitch pattern generator or sample and hold. Try using very
high notes, at very high rates and high intensities—you’ll recognize
this well-known effect from hundreds of science fiction movies!
Sample & Hold
Using the EXS24 mkII Envelope Generator of LFO 1
LFO 1 features a simple envelope generator that is used to control the time it takes for
the LFO modulation to fade in or fade out. At its center position, which can be accessed
by clicking the middle mark, the modulation intensity is static—no fade-in or fade-out
will occur.
To set the LFO 1 modulation fade time
µ
Choose a positive LFO 1 EG knob value to fade in the modulation.
The higher the value, the longer the delay time.
µ
Choose a negative LFO 1 EG value to fade out the modulation.
The lower the value, the shorter the fade-out time.
LFO envelopes are most often used for delayed vibrato—many instrumentalists and
singers intonate longer notes this way.
To set up a delayed vibrato
1 Place the LFO 1 EG knob at a position towards the right (Delay) and modulate the Pitch
destination with the LFO1 source in the router.
2 Set a slight modulation intensity.
3 Select an LFO 1 Rate of about 5 Hz.
4 Choose the triangular wave as the LFO 1 waveform.
194 Chapter 9 EXS24 mkII