PARANORMALBOX EVP RECORDER
EVP RECORDER
CAPTURE · REVIEW · MARK
Records short takes from your microphone and keeps them on this device — nothing is uploaded. The scan marks segments whose audio resembles speech; it does not identify anything, and it is not evidence of anything.
Records short takes from your microphone and keeps them on the device in IndexedDB. Each take can be replayed slowed, reversed or filtered, and scanned offline for segments whose audio resembles speech: energy above the take's own noise floor, tonal structure, and a centroid in the speech range.
The scan describes the audio; it does not identify anything. Two device modes give the same engine a tape-deck layout and a modern analysis suite. Nothing is uploaded, and the note beside every automatic marker explains exactly what the heuristic measured.
Takes are stored in your browser and survive a reload, so a session can be reviewed later. The retro deck presents reels, a level meter and transport keys; the modern suite adds a spectrogram, a marker list and region looping over the same recordings and the same analysis.
EVP, electronic voice phenomena, is the name given to voice-like sounds found on recordings that were not heard at the time. The idea was popularised by Konstantīns Raudive in the late 1960s. Mainstream explanations include radio interference, background speech, equipment noise and the brain’s tendency to hear words in ambiguous sound.
It examines each take offline and marks segments that have energy above the take’s own noise floor, tonal (voiced) structure, and a spectral centroid in the range of human speech. It is a description of the audio, not identification: a marker means the sound looks speech-like, not that it is a voice.
In your browser’s IndexedDB storage on this device. Nothing is uploaded. Clearing site data for paranormalbox.com, or using a private window, will remove them.
Reverse playback is a long-standing part of EVP review, and it is also a useful check: real speech sounds clearly unnatural reversed, so anything that sounds like a word both ways deserves a sceptical second listen.
Yes — use the Audio Analyzer, which accepts any audio file and measures levels, noise floor, clipping and mains hum, with a spectrogram you can inspect.
This is an instrument and a sound tool, provided for entertainment and experiment. It describes what it measures and does not identify the cause of anything it shows.