Operation Manual

30 Parameters

position, there is no vibrato and turning the knob clockwise increases the amount of pitch variation.

The MW modulation entry is used to determine the effect of the keyboard modulation wheel on the

depth of the vibrato. When this modulation is set to zero, the modulation wheel has no effect but

when it is increased, the depth of the vibrato increases as the modulation wheel is moved up. The

increase is always relative to the position of the Amnt control. Finally, the vibrato can be adjusted

to start after a note is triggered. The vibrato is then introduced gradually and the time necessary

for the effect to reach its maximum amplitude is set by the Delay knob.

4.8 The LFO Module

The LFO module is used as a modulation source for the Noise

source module. The waveform of the LFO is selected with the Shape

drop-down menu on the top of the module. The possible values are

Sine, Triangular, Square, Random and Random Ramp. The shape of

the triangular and square waveform can be varied using the Width pa-

rameter. In the case of the triangular wave, the waveform is thus varied gradually from a triangular

shape in the middle position to a sawtooth shape starting at its lowest value and going up when the

knob is turned to its leftmost position to a sawtooth starting from its maximum point and going

down when the knob is fully turned to the right. In the case where the square wave is selected, the

waveform is square when the knob is in its center position and is transformed gradually to a smaller

and smaller pulse as the knob is moved anti-clockwise and to a an increasingly rectangular wave

when moving the knob clockwise from its center position. When the waveform is set to Random,

the LFO module outputs random values at the rate determined by the Sync control or the Rate knob.

In this case, the output value from the LFO module remains constant until a new random value is

introduced. The Random Ramp mode reacts almost like the preceding mode except that the LFO

module ramps up or down between successive random values instead of switching instantly to the

new value.

There are two ways to adjust the rate, or frequency, of the output of the LFO module. If the

Sync control is in its off position, the rate is ﬁxed with the Rate knob. When the Sync control is on,

the frequency of the oscillator is ﬁxed relative to the frequency (tempo) of the host sequencer and

the value set by the Sync control. Sync values range from 16 quarter notes (4 whole notes) to 1/8

of a quarter note (a thirty-second note) where the duration of the whole note is determined by the

host sequencer. The LFO module can also be synced to a triplet (t) or a dotted note (d).

The Delay control allows one to insert a delay between the moment a note is played and the

triggering of the LFO module. Finally the Offset parameter determines the point in the waveform

from which the LFO module is triggered. In its left position, there is no offset and the waveform

starts with with a zero phase. Increasing the Offset parameter moves the starting point later in

the waveform. For example, if a sine wave is selected and the offset adjusted to a value of 25%,

the starting point will correspond to a quarter of a period and therefore to a positive peak of the

waveform and the signal will start decreasing. A value of 75% would correspond to three quarter

of a period and therefore a negative peak and the signal value would then start increasing.