User`s manual

These complex waveforms are actually made up of multiple sine waves — a
fundamental sine wave that determines the base frequency, and sine waves
representing higher harmonics (also called overtones or partials) of that frequency
which, when added together, produce a unique timbre. These harmonics are an
integer multiple of the fundamental frequency, i.e., the second harmonic is twice
the fundamental frequency, the third harmonic is three times the fundamental,
and so on.
Most importantly, other devices can control an oscillator to set its pitch (keyboard
controller), modulate its pitch (vibrato), and modulate the shape of the waveforms
(PWM, Ultrasaw).
4.1.1.2 Unpitched signal generator
Unlike the previous category, an unpitched signal generator (also called noise
generator) has no regular, periodic pattern — the signal’s amplitude is always
changing randomly. Therefore, it has no fundamental frequency (hence no pitch),
and its harmonic spectrum consists of a nearly infinite number of frequencies that
have no harmonic relationship.
Such signals sound very different from the pitched signals, and are like the sound of
wind, a water stream, steam exhaust, rain, waterfall, etc.
4.1.2 Signal enhancers
Signal enhancers (or wave-shapers) transform or distort the oscillator’s basic
pitched signal to increase their harmonic content, and make them sound brighter
and richer. The MiniBrute provides three signal enhancers:
Arturia MiniBrute SE User's Manual 21 4 General description