Recreating the THX "Deep Note" in JavaScript

Tone.js is a powerful framework for creating interactive music in the browser. It provides an elegant API for dealing with audio signals, synthesizers, effects, and more. It is easier to work with than the Web Audio API, allowing us to focus on the creative aspects of audio programming.

The “Deep Note” is characterized by its unique crescendo effect, starting from a chaotic blend of tones that gradually converge into a harmonious chord. To achieve this, we define a set of notes that form a D Major chord, which will serve as our target harmony.

The sheet music specifies that each note start on a random frequency between 200 and 400 Hz and ramps to its target frequency:

Recreating the THX “Deep Note” in JavaScript was a fun challenge. I’d like to try visualizing the sound, perhaps using WebGL or Three.js to create a dynamic audio-visual experience.

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