Free · No Account · Open Source

Brain Beats — tune your mind with monaural beats

A precision audio tool that generates monaural beats targeting specific brainwave frequencies. Customize carrier tones, waveforms, and session timers. Works through speakers — no headphones required.

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What you get
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Full Customization

Adjust base frequency (80–600 Hz), beat frequency (0.5–50 Hz), carrier waveform, and volume. Fine-tune to exactly what works for you.

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5 Brainwave Bands

Quick presets for Delta, Theta, Alpha, Beta, and Gamma ranges with real-time band identification and descriptions.

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Live Visualization

Real-time waveform display powered by the Web Audio API analyser node. See the interference pattern as it plays.

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No Headphones Needed

Unlike binaural beats, monaural beats mix externally. The amplitude modulation is in the signal itself — any speaker works.

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Session Timer

Set timed sessions from 5 to 60 minutes. Audio fades out automatically when your session ends.

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Installable PWA

Add to your home screen on any device. Works offline after first visit. No app store needed.

Brainwave frequency guide
Delta δ
0.5 – 4 Hz Deep sleep · Healing · Recovery
The slowest brainwave frequency. Dominant during dreamless sleep and deep restorative states. Associated with physical healing, immune function, and the release of growth hormone.
Theta θ
4 – 8 Hz Meditation · Creativity · Insight
Present during deep meditation and the hypnagogic state between waking and sleep. Linked to vivid imagery, intuition, and creative breakthroughs. Often the target for experienced meditators.
Alpha α
8 – 13 Hz Relaxation · Calm focus · Flow
The bridge between conscious thinking and the subconscious mind. Dominant when you're relaxed but aware — light meditation, gentle creativity, and stress reduction. A good starting point for newcomers.
Beta β
13 – 30 Hz Concentration · Analysis · Alertness
The dominant rhythm during active waking consciousness. Higher beta frequencies support focused analytical work, problem-solving, and sustained attention. Lower beta supports calm engagement.
Gamma γ
30 – 50 Hz Peak cognition · Learning · Binding
The fastest brainwave pattern. Associated with moments of insight, high-level information processing, and cross-brain neural binding. Notably elevated in experienced meditators.