Make a binaural beat tone

Left ear 200 Hz, right ear 204 Hz — a listener hears a 4 Hz beat. Generate the stereo WAV instead of trusting a streaming app.

Tools used in this guide

The job

A binaural beat is not in the file — it is the brain's response to two slightly different carriers, one per ear. Making the file yourself means the frequencies, level, and duration are exactly what you chose, with no compression artifacts.

Carrier and offset

Pick the carrier frequency and the beat offset directly, or choose a named band — delta 0.5–4 Hz, theta 4–8, alpha 8–14, beta 14–30 — and the tool picks a beat inside it. Duration is capped at 180 s so the stereo WAV stays around 32 MB.

Worked example

Carrier 200 Hz, beat 4 Hz, 30 s: the left channel carries a pure 200 Hz sine and the right 204 Hz, both at 0.3 amplitude — a headphone-only theta-range beat.

Scope

Carrier 40–1,000 Hz, beat 0.1–40 Hz, 5–180 s, stereo 44.1 kHz WAV. Headphones are required — speakers let both ears hear both tones. This produces a tone, not a therapeutic outcome; health claims are outside scope.