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4.2 The Edit View 23

4.2.1 The Oscillator Module

The Oscillator module is the main sound source of Ultra Analog VA and offers the features of

the most reputed analog oscillators. It provides a ﬁne control on the pitch, standard waveforms,

a sub-oscillator, and hard synchronization. The Oscillator module is implemented using precise

modeling algorithms rather than wave tables providing alias free sources with clean pulse width

modulation and synchronization.

Waveform

The Shape drop down menu is used to choose the wave form generated by the oscillator. Wave

forms include sine wave, saw tooth, rectangular and white noise as shown in Figure 8.

When the Shape is set to rectangular, one has additional control and can adjust the pulse width

of the rectangular wave. This parameter is controlled using the PW knob. In its leftmost position

the pulse is very narrow while in its rightmost position the wave is perfectly square and only the

odd harmonics are heard. Note that the pulse width of the rectangular waveform can be modulated

with the signal received from the LFO module. The amount of modulation, around the value set

with the PW knob, can be set from the LFO module using the VCO PW knob.

Amplitude

Time

Amplitude

Time

Amplitude

Time

Amplitude

sinus rectangular

saw tooth noise

Pulse Width

Figure 8: Choice of wave forms provided by the Oscillator module.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 65 66

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