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| WaveWarp 2.0 Example DrawingBoard
AdditiveSynthesisExample1
Description
Additive Synthesis Example 1
Illustrates the method of combining single oscillators (the orange blocks) to create a spectrally rich output (i.e. "additive
synthesis"). Each oscillator generates a tone at a user-defined frequency and amplitude. In this example, the default tones
are all sinusoidal, with each tone separated in frequency by a factor of two from the previous (specifically,
the preset frequencies are 50,100,200,400,800,1600,3200, and 6400 Hz, respectively, representing the harmonics of a
generic musical instrument). The amplitudes have been arbitrarily preset (within the mixer).
Technical note: for efficiency, the waveform in each oscillator is stored in a lookup table. The entire table is changed each
time the frequency or amplitude of the waveform is adjusted via the sliders. This can cause an audible "zipper" noise. If this
is undesirable, e.g. for real-time parameter changing, then use the "controllable" versions of the WaveWarp oscillators
which allow the frequency and/or amplitude of the oscillator to be smoothly modified (via input control signals) in real-time.
However, note that even in this example, the amplitudes of the harmonics can be adjusted smoothly via the "Gain" sliders
inside the mixer (which do not result in the re-computation of the lookup tables).
See "AdditiveSynthesisExample2,3,4,5" for examples utilising controllable oscillators for smooth real-time variation of
frequencies and/or amplitudes.
The Spectrum Analyser clearly displays the "spikes" corresponding to each of the eight harmonics of the signal.
Components used:
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