FREE · PRIVATE · NO SIGNUP
Analyze 7.83 Hz in audio
Inspect the 0–100 Hz spectrum, 7.83 Hz target peak, and 6–8 Hz energy of an audio file privately in your browser.
- 100% private, on-device processing
- Welch-averaged FFT
- WAV, MP3, M4A, AAC, OGG, FLAC, or WebM · at least 5 seconds · up to 100 MB
Private low-frequency analysis
Your audio is decoded and analyzed on this device with a Welch-averaged FFT and Hann window. The file, channel samples, and results are not uploaded or stored.
A transparent 7.83 Hz criterion
The result passes when a distinct peak appears from 7.33 to 8.33 Hz, rises at least 6 dB above its local floor, and remains no louder than −18 dB relative to the program peak. The theta percentage is the 6–8 Hz share of measured 0–100 Hz energy.
Supported audio and measurement limits
Analyze one WAV, MP3, M4A, AAC, OGG, FLAC, or WebM file that is at least 5 seconds long and up to 100 MB. Long files are sampled across their full duration. Format decoding depends on browser support. This signal measurement does not establish medical or sleep efficacy.
Frequently asked questions
Is my audio uploaded?
No. Decoding, FFT analysis, and chart generation all run in your browser, and nothing is retained after you leave the page.
Why might a binaural beat not show a 7.83 Hz peak?
A binaural beat is the perceived difference between two audible carrier frequencies. A waveform FFT shows the carriers, not their perceived difference, so carrier separation needs a separate check.
Does a passing result prove the audio improves sleep?
No. The result verifies a defined signal property only and is not evidence of a health, relaxation, or sleep outcome.