The
basic idea of the “Additive Synthesis” is, to generate a sound
wave by adding harmonic overtones (= integer multiples of a root
wave). In principle every harmonic sound with any timbre can be
produced this way.
But nature is a little more tricky. On one hand no sound has a constant overtone spectrum. In the most cases the higher overtones fade out faster than the lower, so that a sound start bright and ends dull. On the other hand two or more waves with slightly different frequencies can superpose and produce nice humming interference's. You can set an overtone spectrum manually with the volume sliders or you can construct it by selection rules or you can generate it automatically with FFT (Fourier-Transformation) of a natural sound. |
Learning Synthesizer >