KORG Krome music workstasion 61key - Manual (Page 39)

Detailed Editing with Programs Creating time-varying changes (LFO and EG)
35
Creating time-varying
changes (LFO and EG)
Using LFOs
You can use the cyclic change produced by the LFO
(Low Frequency Oscillator) to modulate numerous
aspects of the sound.
Each Program has two LFOs: LFO1 and LFO2. There is
also a single Common LFO, shared by both Oscillators.
While LFO1 and LFO2 are separate for each voice, the
Common LFO is shared by all voices in the Program.
This makes it useful when you want all of the voices to
have an identical LFO effect.
You can use these LFOs to modulate many different
Program parameters, including:
• Pitch (for vibrato)
• Filters (for wah effects)
• Volume (for tremolo)
• Pan (for auto‐panning)
The LFOs can modulate many other parameters, in
addition to those listed above.
Using the basic LFO
1. Access the Prog P5: LFO– OSC1 LFO1 page.
2. Select the Waveform parameter.
Use the INC and DEC buttons to scroll through the
different waveforms, and look at their shapes in the
graphic display.
There are a number of waveforms to choose from. Each
are suited to different applications:
Triangle and Sine are the classic LFO shapes for
vibrato, tremolo, panning, and filter wah effects.
Square is useful for gated on and off filter and amp
effects, and can create trills when modulating pitch.
The Guitar waveform is designed especially for guitar
vibrato; it bends only upwards from the base value.
Saw and Exponential Saw Down are good for
rhythmic filter and amp effects.
Random 1 (S/H) creates the classic sample‐and‐hold
effect, which is great for modulating a resonant filter.
3. After looking at the different waveforms, select
Triangle.
4. Select the Shape parameter, and use the VALUE
dial to move through its different settings, from
–99 to +99.
Notice how the shape of the waveform becomes more
curved, and how –99 emphasizes the lower part of the
shape, and +99 emphasizes the upper part.
5. Select the Phase parameter, and use the VALUE
dial to sweep through its range of values.
Notice how the waveform shifts from side to side.
Among other things, this lets you offset the LFOs from
one another in time, which can create interesting
organic effects.
6. Use the Freq (Frequency) parameter to set the
speed of the LFO.
7. Use the Fade and Delay settings to control the way
the LFO sounds at the beginning of the note.
For more information on LFOs, please see page 42 of
the Parameter Guide.
All of these parameters control the way that the LFO
works. In order for the LFO to actually affect the
sound, you can use the dedicated LFO routings on the
Filter, Pitch, and Amp pages, or use the LFOs as AMS
sources for a wide variety of parameters.
Using EGs (Envelope Generators)
An envelope creates a modulation signal by moving
from one level to another over a specified time, and
then moving to another level over another period of
time, and so on.
The Program includes three EGs, for Pitch, Filter, and
Amp. These produce time‐varying changes in pitch,
tone, and volume respectively. They can also be used to
modulate a number of other program parameters via
AMS.
Note: The parameters that can be modulated by an EG
and the range of values will differ depending on the
EGs provided for each section.
Waveform
Level
Time
note-on note-off
Sutart Level
Attack Time
Decay Time Slope Time
Attack Level
Break Level
Release
Level
Sustain Level
Release Time