A triangle wave is a type of waveform that looks like a series of triangles stacked on top of each other. It rises and falls in a straight line, creating a sharp peak and a sharp valley. This wave is often used in music and sound synthesis because it produces a bright, clear tone. The shape of the triangle wave is defined by its frequency, which determines how quickly it repeats. In electronics, triangle waves are commonly generated by oscillators and can be found in various applications, including signal processing and modulation. They are also used in synthesizers, where they can create unique sounds when combined with other waveforms like sine waves or square waves.