Amplitude Modulation (AM)
A type of manipulation in which one input signal modulates the amplitude of another sound. When done in the sub-audio range by, for example a LFO (Low Frequency Oscillator)A sound wave that has a low frequency (usually below the range of human hearing) but which can be used to manipulate sound within the range of human hearing. LFO (Low Frequency Oscillator) sine wave, the result is a tremolo. When executed at higher frequencies, more complex sounds will result.