Korg m50-73 User Guide

Playing and editing Programs

3. Select a drum kit in the Prog P2: OSC/Pitch– OSC1

Basic page.

4. Specify the basic pitch of the oscillator. For a drum

kit, set “Octave” to +0 [8'].

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.

Using the basic LFO

1. Access the Prog P5: LFO– OSC1 LFO1 page.

2. Select the Waveform parameter.

Use the Inc q and Dec u switches 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

slider 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

slider 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 “PROG P5:
LFO” on page 48 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.

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.

Waveform

Level

Time

Attack Time

Decay Time

Slope Time

Release Time

Attack Level

Start Level

Sustain Level

Break Level

note-on

note-off

Release
Level