Controlling Pitch - Korg NAUTILUS 61 AT Operation Manual

AMS Mixer Smoothing examples
Smoothing with Long Attack
Original AMS A:
Smoothing with Short Attack & Long Release:
More AMS Mixer features
There are more mixer Types, including Offset, Shape, and
Quantize, which offer even more possibilities for creative
programming. For more details, see these sections in the
Parameter Guide:
• "6–1: OSC 1 AMS Mix" on page 89
• "Using SW 1/2 to turn an AMS source on and off" on
page 90
• "Muting individual Wave Sequence steps with SW1" on
page 91
• "Converting from bipolar to unipolar" on page 91
• "Converting from unipolar to bipolar" on page 91

Controlling Pitch

Parameters for controlling pitch are located on the
OSC/Pitch page, as shown below.
Pitch bend
The JS (+X) and JS(–X) settings specify the amount of pitch
change (in semitones) that will occur when MIDI pitch bend
messages are received or when the joystick is moved to left
or right. A setting of +12 allows the pitch to be controlled a
maximum of one octave upward; a setting of –12 allows the
pitch to be controlled a maximum of one octave downward.
Creating Vibrato
You can use an LFO to create vibrato.
LFO 1/2 Intensity sets the depth to which the selected LFO
will affect the pitch. With a setting of +12.00, vibrato will
produce a maximum of ±1 octave of pitch change.
JS+Y Int specifies the amount of vibrato that the LFO will
produce when the joystick is pushed away from yourself.
and Short Release:
Detailed Program Editing Controlling Pitch
• "Selective pitch-bend, using only the joystick" on
page 94
• "Generating a static value" on page 94
Suggestions on using AMS
When making settings for alternate modulation, think of the
effect that you wish to produce, what type of modulation will
be necessary to produce that effect, and what parameter of
the oscillator, filter, or amplifier needs to be controlled.
Next, select a source (AMS) and set the Intensity. If you
proceed logically in this way, you will achieve the desired
effect.
For example, if you want to control a guitar sound so that it
approaches feedback when you move the joystick, you might
set up the joystick to modulate the filter frequency and
resonance.
Controller Setup page
For each program, PROGRAM > Basic/X-Y/Controllers–
Controllers page lets you make settings for the SW1 and
SW2 key, and for RT control knobs 1–6. For more
information, see "SW1 and SW2" on page 29, and "1–8:
Controllers," on page 48 of the PG.
Intensity (AMS Intensity) specifies the depth of vibrato that
will be applied by the LFO when modulated by the selected
AMS (Alternate Modulation Source). For example, if LFO1
AMS is set to After Touch and you set an appropriate value
for Intensity, vibrato will be applied when MIDI aftertouch
messages are received.
As another example, if SW1 is set to SW1 Mod. (CC#80)
on the Set Up Controllers page, LFO1 AMS is set to
SW1Mod. (CC#80), and the AMS Intensity is set to an
appropriate value, vibrato is applied when you turn on SW1
or when MIDI CC#80 is received.
Pitch EG
When the Intensity value is set to +12.00, the pitch EG
specified in the Pitch EG page will produce a maximum of
±1 octave of pitch change.
To realistically simulate the slight change in pitch that
occurs when a string is plucked or at the attack of a brass or
vocal sound, you can use the EG to create a subtle change in
pitch at the attack.
Portamento
Portamento makes the pitch change smoothly when you play
the next note before releasing the previous note.
The Time parameter controls how long it take the pitch to
change. As this value is increased, the pitch will change over
a longer time. With a value of 000, there will be no
portamento.
You can turn Portamento on and off via SW1 or SW2, by
assigning them to Porta.SW CC#65.
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