Using Alternate Modulation (Ams); And The Ams Mixers - Korg NAUTILUS Series Operation Manual

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Using Alternate Modulation (AMS) and the AMS Mixers
AMS (Alternate Modulation Source) refers to any of the
assignable modulation sources in NAUTILUS, including:
• Built-in physical controllers, such as the Joystick, and
RT control knobs
• Incoming MIDI controllers, or MIDI controllers
generated by the X-Y Envelope
• Modulators such as the Filter, Pitch, and Amp EGs, the
LFOs, or the AMS Mixers
Intensity is a parameter that sets the degree (speed, depth,
amount etc.) to which AMS will control the modulation.
A number of frequently-used modulation routings, such as
using the joystick to vary the pitch, are provided as
additional, dedicated routings, separate from AMS.
Note that not all AMS sources may be available for some
modulation destinations.
For details on alternate modulation and AMS, see "Alternate
Modulation Sources (AMS)," on page 901 of the PG.
Using the AMS Mixers
The AMS Mixers combine two AMS sources into one, or
process an AMS source to make it into something new.
For instance, they can add two AMS sources together, or use
one AMS source to scale the amount of another. You can
also use them to change the shapes of LFOs and EGs in
various ways, modify the response of realtime controllers,
and more.
The AMS Mixer outputs appear in the list of AMS sources,
just like the LFOs and EGs.
This also means that the original, unmodified inputs to the
AMS Mixers are still available as well. For instance, if you
use LFO 1 as an input to a AMS Mixer, you can use the
processed version of the LFO to control one AMS
destination, and the original version to control another.
Finally, you can cascade the two AMS Mixers together, by
using AMS Mixer 1 as an input to AMS Mixer 2.
Adding two AMS sources together
AMS mixers will do different things depending on their
Type setting. The A+B setting merges two AMS sources
into one. This can be handy when you need to add one more
modulation source to a parameter, but you've already used
up all of the available AMS slots.
For instance, let's say that you're using an LFO to modulate
Filter Resonance, and then you decide that it would be
interesting to scale that parameter with an EG as well.
Resonance has only a single AMS input, but you can easily
merge the LFO and the EG together using the A+B AMS
Mixer:
1. Assign the LFO to AMS A.
2. Assign the EG to AMS B.
3. Assign the AMS Mixer as the Filter Resonance AMS
source.
44
AMS Mixer A+B example
AMS A: LFO
AMS B: EG
A+B Output
Scaling one AMS source with another
When the Type is set to Amt A x B, the mixer uses the AMS
B input to scale the amount of AMS A. For instance, you can
control the amount LFO1 with the Filter EG, or control the
amount of the Pitch EG with the foot pedal.
AMS Mixer Amt AxB example
AMS A: LFO
AMS B: EG
Amt A×B Output
Smoothing
The Smoothing Type smooths out the AMS input, creating
more gentle transitions between values. You have separate
control of the amount of smoothing during the attack (when
the signal is increasing) and decay (when it's decreasing).
Low settings provide subtle controller smoothing, creating
more gradual joystick, for instance. Higher settings create
auto-fade effects, transforming a quick gesture into a longer
fade-in and/or fade-out event.
Smoothing can also be used to alter the shape of
programmable mod sources, such as LFOs and EGs. For
instance, you can turn a "blip" into a simple envelope shape,
as shown below.