How the listening room works

Two tones, two ears

Use stereo headphones or earbuds for binaural beats. Each ear receives a slightly different tone, creating a perceived beat at the frequency difference.

Carrier is the center frequency: left = carrier − beat/2; right = carrier + beat/2. At a 300 Hz carrier and an 8 Hz beat, the left ear receives 296 Hz and the right 304 Hz.

A mono output or one-ear listening does not preserve that separation. Turn binaural tones off for an explicit ambience-only mix; ambience works on speakers without headphones.

The frequency labels

These continuous ranges classify the beat you selected. They do not measure your brain activity or state. EEG band boundaries vary by convention.

• Delta: 0.5 ≤ f < 4 Hz
• Theta: 4 ≤ f < 8 Hz
• Alpha: 8 ≤ f < 13 Hz
• Beta: 13 ≤ f < 30 Hz
• Gamma-range experiment: 30 ≤ f ≤ 40 Hz

The 30–40 Hz setting is an experiment in the app, and the 40 Hz cap does not define the full EEG gamma range. At higher differences, some listeners may hear two separate tones rather than a distinct beat.

Mix, time, and listen gently

Each ambience has its own level. The master control changes the overall output. A slider percentage is a mixer setting, not a calibrated sound-pressure level or a measure of hearing safety. Start low and adjust to a comfortable level.

Sine is the standard tone. Triangle, square, and sawtooth add harmonics; results from sine-tone research do not automatically apply to them.

Choose a duration or Continuous. A timed session fades out on the audio clock. Pause freezes that clock; Resume continues where it stopped. A browser or device may interrupt audio, especially when a mobile screen locks, so uninterrupted background playback is not guaranteed.

Your records

Factory records are suggested starting points, not clinical prescriptions. Your current draft stays in this browser and updates as you adjust the room.