A synthesizer is an electronic musical instrument that generates sound by combining and modifying audio signals. Most synthesizers have a keyboard that allows the user to play notes and chords, and a set of controls and parameters that can be used to shape the sound.
A synthesizer typically consists of several modules, each of which performs a specific function. These modules may include oscillators, which generate the basic sound waveforms; filters, which shape the timbre of the sound; and envelopes, which control the attack, decay, sustain, and release of the sound.
The user can control the sound of the synthesizer by adjusting the settings on these modules, as well as by using other controls such as the keyboard, pitch bend wheel, and modulation wheel. The output of the synthesizer is typically sent to an amplifier or speakers, where it can be heard.
Overall, a synthesizer works by combining and modifying audio signals to create new and unique sounds. The user can control the sound of the synthesizer by adjusting the settings and controls on the instrument, allowing for a wide range of creative possibilities.