What is Pulse Width Modulation?

Pulse Width Modulation (PWM) is a synthesis technique that changes the width of a pulse wave over time. It is known for creating rich, animated, and evolving sounds.

The process typically involves modulating the duty cycle of a pulse wave, often using an LFO or envelope, which alters the proportion of the waveform’s high and low states.

Pulse Width Modulation emphasizes movement and tonal variation, as even small changes in pulse width can significantly affect the harmonic content.

It is commonly used to create lush pads, expressive leads, and dynamic textures in synthesizers.

Today, PWM is widely used in electronic music and sound design, valued for its ability to add depth, motion, and complexity to otherwise static waveforms.