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Chapter 14 Ultrabeat 363
Set Ultrabeat LFO waveforms
m Drag the Waveform Shape slider from left to right to morph the waveform from a triangle, to a
sawtooth, sine, square, and nally a rectangular wave shape—including all variations in between.
At the far right position, the LFO produces random waveforms.
The graphical display shows the current LFO waveform shape.
The table outlines how dierent waveform shapes can aect your sounds. Intermediate
waveform shapes result in hybrid waveforms and hybrid behaviors.
Waveform Comments
Triangle Well suited for vibrato eects
Sawtooth Well suited for helicopter and space gun sounds.
Intense modulations of oscillator pitch with a
sawtooth wave lead to “bubbling” sounds. Intense
sawtooth modulations of lowpass lter cuto and
resonance create rhythmic eects.
Sine Ideal for smooth, even modulations. Its position on
the Waveform Shape slider enables you to smoothly
morph between sawtooth and square/rectangular
waves.
Square and Rectangle Square/rectangular waves periodically switch the LFO
between two values. The right-hand rectangular wave
switches between a positive value and zero. The left-
hand rectangular wave switches between a positive
and a negative value set to the same amount above/
below zero.
Sample & Hold The right-hand waveform on the Waveform Shape
slider outputs random values. A random value is
selected at regular intervals, as dened by the LFO
rate. 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 oscillator pitch leads
to an eect 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 eect from hundreds
of science ction movies.