Waldorf MicroWave XT Bedienungsanleitung PDF herunterladen (Seite 34)

Overview

To illustrate the principle of wavetable synthesis, we start with an overview that is correct in

a scientific way:

A wavetable is a list consisting of 64 waveforms. Each waveform is classified by its own

very special sound character. Some wavetables contain waveforms with a similar sound

character in between, others include waves with extremely different timbres. The following

diagram shows a part of a wavetable.

You will notice, that the upper three entries in the wavetable consist of the classic analog

type waveforms triangle, pulse and sawtooth. These three waves are identical in every

wavetable. You can always use these classic synthesizer waves, independent of which

wavetable is currently selected.

Both oscillators of a MicroWave II/XT/XTk’s voice use a common wavetable. However each

oscillator can play a different waveform inside the list. E.g. oscillator 1 can play a sine wave

from position 1 of the list while oscillator 2 is playing a sawtooth wave from position 63.

The main difference of wavetable synthesis compared to other sound generation principles

is the facility not only to play one waveform per oscillator, but also to walk through the

wavetable via different modulations. Therefore you can create wavetable sweeps. E.g. an

oscillator can start with an sine wave and blend over to a sawtooth wave after some time.

According to the wavetable used, the results can be very drastic – much more than any

sample playback based system could ever produce. That is a unique feature of wavetable

synthesis.

The capabilities of this principle are very strong. To give some examples:

• Each note on a 5 octave keyboard can access a different wave of the wavetable

because such a keyboard has 61 keys, 3 less than the number of wavetable items.

• Different waves can be played depending on key velocity.

• An LFO can modulate the position inside the wavetable. Depending on the

wavetable you can create subtle to drastic sound changes.

• Random controllers like e.g. the modwheel can change the position inside the

wavetable. When you turn the wheel while playing a chord, each note’s wave will

be modified instantly.

These are just a few examples of the capabilities the MicroWave II/XT/XTk’s wavetable

synthesis offers. In the following paragraphs we move deeper into the subject, and by the

way we get a little more specific.

Wave 63

Wave 62

Wave 61

Wave 60

Wave 59

Wave 58

Wave 02

Wave 01

Wave 00

Wave 57

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