A function generator or audio frequency (AF) oscillator is an electronic device that generates various waveforms at audio frequencies. These waveforms can be used for testing and troubleshooting electronic circuits, as well as for audio signal processing, such as in music production and synthesis.
Function generators typically offer a variety of waveforms, including sine, square, triangle, and sawtooth waves, as well as pulse and noise signals. They also allow the user to control the frequency, amplitude, and duty cycle of the waveform and may include modulation capabilities such as amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM).
AF oscillators are commonly used in audio equipment design and testing, such as in the development of amplifiers, filters, and audio mixers. They are also used in acoustic measurements, such as in the analysis of sound waves and the measurement of sound pressure levels.