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RE7: Density

Displayed as:

O1Dense

Initial value:

Range of adjustment:

0 to 127

The density parameter effectively adds copies of the oscillator waveform to itself. Up to
eight additional virtual oscillators are used for this, depending on the value of the param-
eter. This produces a “thicker” sound at low to medium values, but if the virtual oscillators
are detuned slightly (see

RE8

below), a more interesting effect is obtained.

RE8: Density Detuning

Displayed as:

O1DnsDtn

Initial value:

Range of adjustment:

0 to 127

This parameter should be used in conjunction with the Density control. It detunes the
virtual density oscillators, and you will notice not only a thicker sound, but the effect of
beating as well.

The Density and Density Detune parameters can be used to “thicken” the sound,
and simulate the effect of adding additional Voices. The Unison and Unison
Detune parameters in the Voice Menu can be used to create a very similar effect,
but using Density and Density Detune have the advantage of not needing to use

additional Voices, which are inite in number.

Per-oscillator parameters (Page 2)

RE1: Pitch wheel range

Displayed as:

O1PtchWh

Initial value:

+12

Range of adjustment:

-12 to +12

The pitch wheel can vary the oscillator pitch by up to an octave, up or down. The units are
in semitones, so with a value of +12, moving the pitchwheel up increases the pitch of the
notes being played by one octave, and moving it down takes them down an octave. Setting
the parameter to a negative value has the effect of reversing the operating sense of the
pitch wheel. You will ind that many of the factory patches have this parameter set to +2,
allowing a pitch wheel range of 1 tone. It is worth noting that (like all per-oscillator param-
eters) the value can be set independently for each oscillator.

RE2: Wave Table Interpolation

Displayed as:

O1WTInt

Initial value:

127

Range of adjustment:

0 to 127

This parameter sets how smooth the transition is between adjacent waveforms in the same
wavetable. A value of 127 will create a very smooth transition, with the adjacent waveforms
blending together. With a value of zero the transitions will be abrupt and obvious. With a
high 01WInt value set, it is possible retain a mix of adjacent waveforms if the modulation
value remains ixed. When modulating the wavetable Index (via LFO, etc.), the wavetable
interpolation parameter sets how smooth (or not!) the transition is.

Common Oscillator parameters

The remaining parameters in the Oscillator Menu are common to all 3 oscillators. They are
available whichever oscillator is selected by the

SELECT

button [10].

RE3: Single Fixed Note

Displayed as:

FixNote

Initial value:

Off

Range of adjustment:

Off, C# -2 to G 8

Some sounds need not be chromatically-dependent. Examples would be certain percus-
sion sounds (e.g., bass drums), and sound effects, such as a laser gun. It is possible to as-
sign a ixed note to a patch, such that playing any key on the keyboard generates the same
sound. The pitch on which the sound is based may be any semitone note in a range of over
ten octaves. With the parameter set Off, the keyboard behaves as normal. With it set to any
other value, every key plays the sound at the pitch corresponding to the value.

RE4: Vibrato depth

Displayed as:

ModVib

Initial value:

Range of adjustment:

0 to 127

Adding vibrato to an oscillator modulates (or varies) the pitch of the note cyclically, adding
a “wobble” to the tone. This parameter determines the vibrato depth, and hence how obvi-
ous the “wobble” is. The mod wheel is used to apply vibrato, with the ModVib parameter

value representing the maximum depth of vibrato that can be obtained with the mod wheel
in its fully ‘up’ position. On the UltraNova, VibMod and MvibRate (below) are common
parameters that affect all oscillators and do not require the use of the LFO section.

RE5: Vibrato Rate

Displayed as:

MVibRate

Initial value:

Range of adjustment:

0 to 127

This parameter sets the rate (or frequency) of the vibrato from very slow (value= 0) to very
fast (value=127).

RE6: Oscillator Drift

Displayed as:

OscDrift

Initial value:

Range of adjustment:

0 to 127

When the three oscillators are set to the same tuning, their waveforms are perfectly
synchronised. Old analogue synthesizers were unable to stay perfectly in tune, and Oscil-
lator Drift ‘emulates’ this imperfection by applying a controlled amount of detuning so that
the oscillators are slightly out of tune with each other. This adds a “fuller” character to the
sound.

RE7: Oscillator Phase

Displayed as:

OscPhase

Initial value:

0deg

Range of adjustment:

Free, 0deg to 357deg

This adjusts the point in the waveform at which the oscillators start, and is adjustable in
3 degree increments over one whole waveform cycle (360 ). The effect of this is to add a
slight “click” or “edge” to the start of the note, as the instantaneous output voltage when
the key is pressed is not zero. Setting the parameter to 90 or 270 produces the most
obvious effect. With the parameter set to 0º, the oscillators always start precisely in step. If
Free is set, the phase relationship of the waveforms is unrelated to when a key is pressed.

RE8: Noise Source Type

Displayed as:

NoiseTyp

Initial value:

White

Range of adjustment:

White, High, Band or High-band

In addition to the three main oscillators, the UltraNova also has a noise generator. White
noise is deined as a signal with “equal power at all frequencies”, and is a familiar “hissing”
sound. Restricting the bandwidth of the noise generator alters the characteristic of the
“hiss”, and the other three options for this parameter apply such iltering. Note that the
noise generator has its own input to the mixer, and in order to hear it in isolation, its input
will need to be turned up and the oscillator inputs turned down. (See 15.)

the mIxer

The outputs of the three oscillators and the noise source are passed to a simple audio
mixer, where their individual contributions to the overall sound output can be adjusted.
Most of the factory patches use either two, or all three oscillators, but with their outputs
summed in various combinations of levels. Pressing the

MIXER

button [12] opens the

Mixer Menu, which has two pages. One of the

PAGE

buttons will be illuminated, indicating

that further menu pages are available. A total of 6 inputs and two FX sends are available for
adjustment on Page 1, and each input can be solo’d on Page 2.

As with any other audio mixer, don’t be tempted to turn all the inputs up. The
mixer should be used to balance sounds. If multiple sources are in use, then
each input setting should be about halfway – about 64 or so, and the more
inputs you are using, the more careful you need to be. If you get this wrong, you
risk internal signal clipping, which will sound extremely unpleasant.

Mixer parameters (Page 1)

RE1: Oscillator 1 Level

Displayed as:

O1Level

Initial value:

127

Range of adjustment:

0 to 127

This parameter sets the amount of Oscillator 1’s signal present in the overall sound.

O1PtchWh

O1WTInt

ModVib