75
Chapter 7: Preset Programming
PRESET PROGRAMMING
LOW FREQUENCY OSCILLATORS (LFOs)
A
Low Frequency Oscillator
or LFO is simply a wave which repeats at a slow
rate. The UltraProteus has two multi-wave LFOs for each of its 32 channels. The
LFO waveforms are: Triangle, Sine, Square, Sawtooth, and Random, which is a
random “sample and hold” type of wave.
By examining the diagram of the LFO waveforms, you can see how the LFO will
affect a modulation destination. Suppose we are modulating the pitch of an
instrument. The sine wave looks smooth, and will smoothly change the pitch.
The square wave changes abruptly, and will abruptly change the pitch from one
pitch to another. The sawtooth wave smoothly decreases, then abruptly changes
back up. The sound’s pitch will follow the same course. Controlling the pitch of
an instrument is an easy way to hear the effects of the LFO waves.
Like the Auxiliary Envelope, the LFOs can be routed to control any realtime
functions such as Pitch, Filter, Panning, or Volume. A common use for the LFO
is to control the pitch of the sound (LFO
➡
Pitch). This effect is called vibrato
and is an important performance parameter. Many presets use this routing with
the modulation wheel controlling “how much” LFO modulation is applied.
Another common effect, Tremolo, is created by controlling the volume of a
sound (LFO
➡
Volume) with the LFO.
Another use for the LFOs might be to add a slight bit of animation to the sound
by routing the LFO to control the filter. In this example, the LFO amount would
be set low, for a subtle effect.
When the amount of an LFO is a negative value, the LFO shape will be inverted.
For example, inverting the sawtooth wave produces a wave that smoothly
increases, then instantly resets down.
Triangle
Square
Sine
Sawtooth
Random
Inverted Sawtooth
Negative Amount
+
-
Sawtooth
Summary of Contents for Ultraproteus
Page 1: ......
Page 11: ...Chapter 1 Basic Setup 1 UltraProteus INTRO BASIC SETUP ...
Page 12: ...UltraProteus Operation Manual 2 ...
Page 20: ...UltraProteus Operation Manual 10 ...
Page 21: ...11 Chapter 2 Basic Operation UltraProteus BASIC OPERATION ...
Page 27: ...27 Chapter 4 Midimap Menu UltraProteus MIDIMAP MENU ...
Page 28: ...28 UltraProteus Operation Manual ...
Page 37: ...37 Chapter 5 Effects Section UltraProteus EFFECTS SECTION ...
Page 38: ...38 UltraProteus Operation Manual ...
Page 57: ...37 Chapter 5 Effects Section UltraProteus EFFECTS SECTION ...
Page 58: ...38 UltraProteus Operation Manual ...
Page 77: ...57 Chapter 6 Hyperpreset Menu UltraProteus HYPERPRESET MENU ...
Page 78: ...58 UltraProteus Operation Manual ...
Page 87: ...83 Chapter 7 Preset Programming PRESET PROGRAMMING ...
Page 103: ...67 Chapter 7 Preset Programming PRESET PROGRAMMING UltraProteus PRESET PROGRAMMING ...
Page 104: ...68 UltraProteus Operation Manual PRESET PROGRAMMING ...
Page 120: ...99 Chapter 8 Preset Menu UltraProteus PRESET MENU ...
Page 121: ...100 UltraProteus Operation Manual ...
Page 149: ...128 UltraProteus Operation Manual ...
Page 150: ...129 Chapter 9 Copy Menu COPY MENU UltraProteus COPY MENU ...
Page 151: ...130 UltraProteus Operation Manual COPY MENU ...
Page 158: ...137 Chapter 10 Step by Step STEP BY STEP UltraProteus STEP BY STEP ...
Page 159: ...138 UltraProteus Operation Manual STEP BY STEP ...