Using Lfos And Envelopes (Egs); Adjusting The Filter - Korg microSTATION Operation Manual

Using LFOs and Envelopes (EGs)
Using LFOs
Each Oscillator 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.
Basic LFO settings
Here we'll adjust settings for the LFO1 of oscillator 1.
1. Choose PROG EDIT: OSC1 "LFO1".
2. Step through the various LFO1 waveforms to see
what is available.
Numerous waveforms are provided, and there are
typical uses for each waveform.
Triangle and Sine are typical LFO shapes used for
vibrato, tremolo, pan, and filter wah effects.
Square is suitable for gate filtering or volume
change; it can be used to create a siren effect by
varying the pitch.
Guitar is designed to simulate the vibrato produced
by a guitarist; it only varies upward from the base
value.
Saw and ExpSawDwn are appropriate for
rhythmical changes in filter or volume.
Rnd1 (S/H) is suitable for controlling a resonant
filter to create the typical sample‐and‐hold effect.
3. After you've noted each waveform, choose
Triangle.
4. Choose PROG EDIT: LFO "LFO1 Speed."
5. Adjust the speed of LFO1.
6. The "LFO1 Fade" and "LFO1 Delay" settings
control how LFO1 will be applied immediately
after the note‐on.
For more about the LFO, refer to PG p.6.
These parameters control the movement of the LFO
itself. The way that the LFO affects the actual sound is
determined by the following parameters.
• Pitch EG/LFO: LFO1Int
Playing programs Using LFOs and Envelopes (EGs)
• OSC1/OSC2: FltLFO1toA–FltLFO2toB,
AmpLFO1Int–AmpLFO2Int, P.LFO1 AMS Int,
P.LFO2 AMS Int
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.
note-on
Attack Level
Level
Decay Time
Attack Time
Sutart Level
Adjusting the filter
A filter boosts or cuts specific frequency regions of the
sound.
Filter settings have a significant influence on the
character of the sound.
Adjusting the filter
Cutoff (cutoff frequency)
A filter cuts the frequency region that lies above or
below the specified cutoff frequency, or around that
frequency. The result will depend on the type of filter
you use.
Low Pass
High Pass
Band Pass
Band Reject
note-off
Break Level
Sustain Level
Release Time
Slope Time
Cutoff Frequency
Release
Level
Time
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