What is a Square Wave?

A Square Wave is a type of waveform that alternates abruptly between two levels, creating a sharp, rectangular shape. It is known for producing a hollow, buzzy tone rich in harmonics.

The waveform typically switches instantly between high and low values, resulting in a sound that contains only odd-numbered harmonics.

A Square Wave emphasizes strong, distinct tonal character, making it useful for creating lead sounds, basses, and digital-style tones.

It is commonly used in synthesizers, electronic music, and early digital audio systems.

Today, Square Waves remain a fundamental waveform in sound synthesis, valued for their clarity, harmonic richness, and versatility in sound design.