LFO stands for Low-Frequency Oscillator. It is a term primarily used in the field of electronic music and sound synthesis.
In the context of music production, an LFO refers to an electronic signal that generates a repeating waveform with a frequency typically below the audible range of human hearing, usually ranging between 0.1 Hz and 20 Hz. This low-frequency waveform is then used to modulate various parameters of sound synthesis and audio processing equipment.
LFO signals are commonly used to create rhythmic variations and modulation effects in electronic music. By applying an LFO to parameters such as pitch, volume, filter cutoff, or pulse width, musicians and producers can achieve a wide range of effects like vibrato, tremolo, wah-wah, and spatial movements. The cyclic nature of an LFO waveform allows for cyclic and repetitive patterns in sound modulation.
LFOs are designated to produce specific waveforms, including sine, square, triangle, sawtooth, and random waveforms. Each waveform type has its own sonic characteristics, lending a unique flavor to the modulated sound.
Beyond music, LFOs are also utilized in various other fields involving control systems and automation. The oscillating patterns generated by LFOs find applications in areas such as robotics, lighting systems, and even visual arts.
Overall, an LFO is a key tool in sound synthesis, enabling the creation of dynamic and evolving audio effects by modulating various sound parameters over time.
