Korg NAUTILUS Series, Parameter Manual, Page: 102 / 961

PROGRAM mode: HD-1
92
Smoothing
This Mixer 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).
The higher the Attack and Decay settings, the more that the
input will be smoothed.
Low settings provide subtle controller smoothing. 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.
AMS Mixer Smoothing examples
AMS A [List of AMS Sources]
This selects the AMS source to be smoothed.
For a list of AMS sources, see “Alternate Modulation Source
(AMS) List” on page 901.
AMS A Attack [00…+99]
This controls the attack time of the smoother, or how long it
takes the smoother to reach a new,
higher value.
Higher Attack settings mean longer times.
Depending on how quickly the AMS input value is
changing, high Attack settings may mean that the value is
never quite reached, as shown in “AMS Mixer Shape
examples,” above.
AMS A Decay [00…+99]
This controls the decay time of the smoother, or how long it
takes the smoother to reach a new,
lower value.
Higher Decay settings mean longer times.
Shape
This Mixer Type adds curvature to the AMS input. Shape
can create custom controller curves, such as exponential
joystick, logarithmic velocity, and so on. It can also alter the
shape of programmable modulation sources, such as EGs
and LFOs.
Note: Shape only affects AMS signals which already have
some amount of slope, such as EGs, triangle and sine LFOs,
and so on. It does not affect signals which only contain
abrupt transitions, such as square waves.
AMS A [List of AMS Sources]
This selects the AMS input source to be shaped.
For a list of AMS sources, see “Alternate Modulation Source
(AMS) List” on page 901.
Mode [Symmetric, Asymmetric]
This selects whether Shape will produce one or two curves.
The graphic “AMS Mixer Shape examples” may help to
visualize how this works.
Asymmetric will produce a single curve, extending from –
99 to +99.
Symmetric will produce two matching curves extending
outwards from 0 to –99 and +99, respectively.
Shape [–99…+99]
This controls the amount of curvature, and whether the
curves are concave or convex. As you can see in the graphic
examples, the shape will tend to emphasize certain value
ranges, and de-emphasize others.
For example, let’s say that you are using a triangle LFO,
through Shape, to modulate filter cutoff. If Shape
emphasizes the high value range, the filter will spend more
time at the higher frequencies. If it emphasizes the low
range, the filter will spend more time at the lower
frequencies.
Original AMS A:
Smoothing with Long Attack
and Short Release:
Smoothing with Short Attack & Long Release:
Here’s a handy chart which shows the results of Shape with the different settings and input types:
Mode Input Shape Result
Symmetric
Unipolar
Positive (+) emphasizes upper value range
Negative (-) emphasizes lower value range
Bipolar
Positive (+)
emphasizes both upper and lower value ranges,
and de-emphasizes the center
Negative (–) emphasizes center value range, around 0
Asymmetric
Unipolar
Positive (+) emphasizes extreme upper range, with offset
Negative (–) emphasizes extreme lower range, with offset
Bipolar
Positive (+) emphasizes upper value range
Negative (–) emphasizes lower value range