Specifications

146 E-MU Systems
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Low Frequency Oscillators (LFOs)
Shape
LFO waveforms have different shapes. The shape of the waveform deter-
mines the effect of the LFO. LFOs have traditionally been used to add
vibrato or repeating movement to a sound. These new shapes offer a lot of
new programming possibilities.
If you modulate the pitch of an instrument, it’s easy to visualize the shape
of the waveform. For example, the sine wave has a smooth, rolling shape
that changes the pitch smoothly. The square waveform changes between
two pitches abruptly. A sawtooth waveform increases the pitch smoothly,
then abruptly changes back down. The available waveforms are shown
below.
Triangle
Square
Sine 1,2 Sine 1,3,5
Sine
Sawtooth
25% Pulse
33% Pulse
12% Pulse16% Pulse
Random
Pat: Fifth+Octave
C
C
G
Pat: Octaves
+ Octave
- Octave
C
F
G
Pat: Sus4 trip
C
G
A#
Pat: Neener
Hemi-quaver
Sine + Noise
LFO Tricks & Tips:
• The Random LFO wave is truly
random and is different for
each voice and layer.
• The Pattern (Pat) waveforms
will sound the same on
different layers and voices.
• Sine + Noise is very useful for
simulating trumpet and flute
vibrato.
★ When routing Hemi-quaver
to Pitch:
+38 = major scale
-38 = phrygian scale
+76 = whole tone scale
(+38) + (+76) = diminished
(two cords)
odd amount = S+H sound
Note: References to musical
intervals in the pattern LFO
shapes are with the LFO
routed to pitch and a
PatchCord amount of +38
.