LFOS stands for Low Frequency Oscillator, which is an electronic signal generator used in audio synthesis and modulation. An LFOS generates electrical waveforms at frequencies below the audible range, typically between 0.01 Hz and 20 Hz. It serves as a control signal within audio processing systems to produce various effects and modulations.
In audio synthesis, an LFOS produces continuous periodic waveforms that can be used to alter the timbre, pitch, or volume of a sound. It can create cyclic variations in parameters such as filter cutoff, oscillator pitch, or tremolo, adding dynamic motion and animation to the sound. The LFOS can generate different types of waveforms such as sine, triangle, square, or sawtooth, each with specific tonal characteristics.
In modulation, LFOS are used to shape the modulation depth or speed of other audio signals. Common applications include vibrato effects, tremolo effects, chorus, flanger, or phaser effects, where the LFOS controls the time-varying parameters of these effects. By modulating parameters in sync with the audio signal, LFOS help create dynamic and expressive sounds.
LFOS are commonly found in electronic music synthesizers, software synthesizers, guitar effects pedals, and audio processing units. They provide a versatile means of adding movement and modulation to sound, allowing musicians and producers to create evolving, expressive, and unique audio textures.
