OSC 1 Modulation

ENV 2 Knob

This knob controls the amount of pitch modulation to OSC 1 from envelope 2. In the centre position there is no effect on the oscillator's pitch, to the left the effect is negative (ie. the pitch drops and then rises) and to the right positive (the pitch rises and then falls). The further you set the knob from the central position the further the pitch rises and falls. See the "Envelope Section" later for the exact programming of the rise and fall times.

LFO Knob

This knob controls the amount of pitch modulation to OSC 1, ie. how much above and below the set pitch the oscillator regularly rises and falls. If the LFO is set to Triangle wave and it's speed is above the centre of its range, then this will normally produce a vibrato effect, but other effects like a siren or seagull cries are possible with more extreme settings. See the LFO section later for more detail on adjusting the LFO parameters to create these effects.

Pulse Width Knob

This knob has a direct effect on the Pulse Width when the waveform of the selected oscillator is set to Pulse (Square).

When the Mod Source switch is set to Manual, the position of this knob controls the actual width of the Pulse. At the far left, the Width is 50% (ie. minimum and maximum values are of equal length) giving a special case which we refer to as a square wave, which contains all the odd-numbered harmonics giving a 'hollow' sound reminiscent of a clarinet. As you move the knob to the right the Pulse Width gets narrower and more and more high harmonics are added at the expense of the fundamental pitch giving the sound a thin, trebly quality. At the far right the fundamental has almost disappeared and the sound becomes very thin indeed.

When the Mod Source (PWM) switch is set to ENV1, Env 2 or LFO, this knob governs the amount of variation in the pulse width in a negative or positive direction about a central 'off' position. As the knob is moved to the left, the variation in the Pulse Width will increase progressively in a negative manner whilst moving it to the right will vary the Pulse Width in a positive manner.

PWM Switch

This switch allows you to select the source for Pulse Width Modulation (PWM) to modulate the OSC1’s Pulse (Square) waveform.

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You will only hear the effect of the PWM if OSC 1s’ Pulse (Square) Waveform is selected and OSC 1 level isn’t zero.

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OSC 2 Modulation

ENV 2 Knob

This knob controls the amount of pitch modulation to OSC 2 from envelope 2. In the centre position there is no effect on the oscillator's pitch, to the left the effect is negative (ie. the pitch drops and then rises) and to the right positive (the pitch rises and then falls). The further you set the knob from the central position the further the pitch rises and falls. See the "Envelope Section" later for the exact programming of the rise and fall times.

LFO Knob

This knob controls the amount of pitch modulation to OSC 2, ie. how much above and below the set pitch the oscillator regularly rises and falls. If the LFO is set to Triangle wave and it's speed is above the centre of its range, then this will normally produce a vibrato effect, but other effects like a siren or seagull cries are possible with more extreme settings. See the LFO section later for more detail on adjusting the LFO parameters to create these effects.

Pulse Width Knob

This knob has a direct effect on the Pulse Width when the waveform of the selected oscillator is set to Pulse (Square).

When the Mod Source switch is set to Manual, the position of this knob controls the actual width of the Pulse. At the far left, the Width is 50% (ie. minimum and maximum values are of equal length) giving a special case which we refer to as a square wave, which contains all the odd-numbered harmonics giving a 'hollow' sound reminiscent of a clarinet. As you move the knob to the right the Pulse Width gets narrower and more and more high harmonics are added at the expense of the fundamental pitch giving the sound a thin, trebly quality. At the far right the fundamental has almost disappeared and the sound becomes very thin indeed.