Generative music is a technique where music is created by systems that introduce randomness, rules, or algorithms to produce evolving soundscapes. Instead of composing every note directly, you set up processes that decide what happens next, resulting in music that is always changing and never exactly the same twice. With Tone.js, you can easily combine randomization and automation to build these dynamic musical experiences in the browser.

Automation is a powerful tool in generative music. In this context, automation means automatically changing audio parameters—such as volume, filter cutoff, or effect wetness—over time, without user intervention. This creates movement and variation in your sound, making it feel alive and evolving. By combining random note or chord selection with parameter automation, you can create immersive and unpredictable musical environments that keep listeners engaged.