EXi: MOD-7 Waveshaping VPM Synthesizer
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If both inputs contain three frequencies each, the number of
sidebands grows to 18; if they contain four frequencies each,
it grows to 32; with five each, the sidebands grow to 50. So,
the effect can become very complicated, very fast!
(If the Carrier and Modulator are harmonically related, the
frequencies of some of the sidebands may be the same,
resulting in a somewhat simpler tone.)
If one or more sum frequencies are higher than 24kHz (half
of the sample rate), this will cause aliasing. Aliasing adds its
own sidebands, which may or may not enhance the effect of
the ring modulator. If you want to minimize aliasing, avoid
using bright tones for both the Carrier and Modulator
simultaneously. If one of the sounds is very bright, consider
using a dark, lowpassed sound for the other.
Crossfade Parameter Details
These items appear in the Parameter Details area when the
Ring Modulator Crossfade parameter is selected.
AMS [List of AMS Sources]
This selects an AMS source to control the Crossfade. For a
list of AMS sources, see “Alternate Modulation Source
(AMS) List” on page 901.
Intensity [–100…+100]
This controls the depth and direction of the AMS modulation
for Crossfade.
5–4f: Output
On [Checkbox]
This mutes and un-mutes the entire VPM Oscillator, for
quick comparisons during editing. This parameter is also
shown in the Parameter Details on the Patch Panel.
Note that the Oscillator will still use processing power
unless the Mode is set to Off.
Output Level [0…100]
This sets the basic output level of the VPM Oscillator. It is
also shown in the Parameter Details on the Patch Panel.
If the Oscillator is an FM Modulator, the output level affects
the brightness of its associated Carrier(s). If the Oscillator is
an FM Carrier, the output level affects volume.
EG Select [None, EG1…EG9, Amp EG]
This selects any of the 10 EGs to control the Oscillator’s
output level. By default, EGs 1-6 are assigned to VPM
Oscillators 1-6, EG7 is assigned to the PCM Oscillator, and
EG8 is assigned to Filter A Cutoff.
None is the same as if the EG was always at its maximum
level.
Velocity Sens [–100…+100]
This controls the degree to which output level responds to
velocity. Negative settings are useful for creating velocity
crossfades between two sets of VPM Oscillators.
Output Level Parameter Details
These items appear in the Parameter Details area when any
of the parameters in the Output section are selected. This
includes On, Output Level, EG Select, and Velocity S ens .
AMS Mode [Add, Multiply]
To calculate the VPM Oscillator’s output volume, the main
Level parameter, Velocity Sens, Key Tracking, and the
selected EG are always multiplied together. If the value of
any of these is at 0, none of the others has any effect. For
instance, if the selected EG falls to 0, Key Tracking can’t
bring the level back up again.
The AMS Mode parameter determines how AMS
modulation (including Int Mod) interacts with these other
modulators.
Add: AMS is added in after Level, Velocity Sens, Key
Tracking, and the EG are multiplied together. This means
that even if one of the main values is at 0, AMS can still
bring up the volume to its maximum.
You can also think of this as having parallel modulation
paths: EG, Key Track, and Velocity Sensitivity on one side,
and AMS on the other.
Expressed mathematically, this is:
Volume = (Level*EG*Key Track*Vel Sens)+AMS.
Multiply: This is the default, and is similar to the way that
most other NAUTILUS Amp modulation works. AMS is
multiplied along with all of the other modulators.
Expressed mathematically, this is:
Volume = Level*EG*Key Track*Vel Sens*(1+AMS).
AMS [List of AMS Sources]
This selects the main modulation source for controlling the
Output Level. For a list of AMS sources, see “Alternate
Modulation Source (AMS) List” on page 901.
Intensity [–100…+100]
This controls the depth and direction of the Output Level
modulation.
AMS Int. Mod [List of AMS Sources]
You can modulate the AMS Intensity from another AMS
source. This selects that source.
Intensity [–100…+100]
This controls the depth and direction of the Intensity Mod
AMS. The result is summed with the main AMS 1 Intensity
to produce the final Output Level modulation amount.
5–4g: Parameter Details
The Parameter Details area shows information for the
selected item, including explanatory graphics and AMS
modulation routings.
• The Mode graphic appears when any of the parameters in
the Main section are selected.
• Pitch Modulation appears when Ratio, (Ratio) Fine,
Freq Offset, (Freq Offset) Fine, Initial Phase, or Phase
Sync are selected.
• Feedback Modulation appears when Feedback is
selected.
• Drive Modulation appears when any of the parameters in
the Waveshaper section other than Offset are selected.
This includes Table, Drive, Key Slope, Slope Shape,
HPF, and Makeup Gain.
• Offset Modulation appears when the Waveshaper Offset
parameter is selected.
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