The original sound that you hear in the patches is made by the oscillators, and is then fed through the synthesizers signal path. If you set oscillation to a genuinely low pitch, you would end up with gaps because the waveform is endlessly dependent on the speed pitch of the note. And so the different sounds are produced by the shape of the wave form, which is the product of oscillation.

There are some standard oscillator wave forms. For a sharp biting type sound, you require the saw wave. Its called this because it's shape is like those on a saw blade

To get a soft mild tone then you will want the Sine-wave, which's shaped like a horizontal S; it has a smooth up and down shape to it.

A specific colour of noise will produce noise even though it is not truly a wave-form

To get that sound that simulates a hollow reed you need the square wave. This is distinguishable by its nearly perfect square appearance.

A variance to the square wave is the pulse-wave, although its merely half as wide. It has the interesting ability to have a modulated width. Perhaps you've heard this as being related to as the Pulse Width Modulation.

To find a glad medium between the saw wave and sine wave you would need the triangle-wave, which's the shape of a triangle.

Most often a synthesizer has 2-3 oscillators. Being as that is the case, you can do a couple of fascinating stuff by mixing the waveforms together. Plus you can tune them so they're different from one another. It can be tuned in semitones, octaves or in cents. A swirling untuned sound is produced by many oscillators which are cents apart from one another. Cents is a hundredth of a semi-tone.

There's an oscillator recognise as a low frequency oscillator. Its frequencies are undetectable provided you physically tune it into a regular hearing range. Its job is to tone the pitch of the oscillator or the filter frequency. The start stop of the wave form is rather noticeable because the LFOs are like the oscillators in that they still use average wave forms. When utilized in good order for illustration the sine-wave permits you to hear an increasing or decreasing sound of the wave-shape. Animation and moving texture would be the end result for your synthesiser sound if complete properly.