Client-Side Generative Audio: Procedural Sound in the Browser
The immersive experience can generate its soundtrack entirely on the visitor’s device. No prerecorded track is required: oscillators, procedural noise, filters, delay, reverb, dynamics, and spectral analysis are assembled in the browser after the visitor explicitly turns Sound on.
A synthesizer graph instead of an audio file
The Web Audio API connects small processing nodes into a directed signal graph. Mesmerization.com uses locally generated oscillators and noise, then shapes them with filters, spatial separation, amplitude modulation, ambience, limiting, and analysis. Audio remains off until the visitor deliberately enables it.
Four sound materials
Drift layers low harmonic tones into a slowly moving drone. Stereo Field places two slightly detuned carriers across the stereo image. Soft Pulse applies smooth amplitude modulation instead of abrupt on/off clicks. Noise Ocean uses generated broadband noise filtered toward a warmer texture. Each mode is a sound-design choice rather than a medical protocol.
The audio clock is the timing authority
Browser interface timers can pause or jitter when rendering work is heavy. Audio parameters are therefore automated against the AudioContext clock so fades, modulation changes, and crossfades remain smooth even while the visual renderer is busy.
Sound can drive image without controlling it
An analyser measures broad bass, midrange, treble, and total energy bands from the generated output. The Visual Sync control determines how strongly those measurements influence procedural motion. Setting Visual Sync to zero leaves the sound audible while removing audio-driven visual modulation.
Research language needs restraint
Binaural, monaural, and amplitude-modulated sounds are studied in auditory neuroscience, but reported cognitive and clinical effects vary by method and study. The site does not claim that a generated soundscape can force a brain state, provide hypnotherapy, treat illness, or reproduce a clinical entrainment protocol.
Volume is ultimately a hardware property
The in-page volume control maintains digital headroom, but a browser cannot know the acoustic sound-pressure level reaching a listener. Headphones, amplifiers, speakers, operating-system volume, and device hardware all matter. Start with system or headphone volume low and increase only to a comfortable level.