EVP Bench: Ghost Hunting Lab

EVP Bench is an audio workbench for EVP work. Every other app in this corner of the store generates sound. EVP Bench generates nothing — it records what is actually in the room and gives you the tools to examine it.

THE BENCH
Open any recording into a workbench built for one job: hearing what is buried in it.

• Time stretch from 0.25x to 2x with the pitch held steady
• Pitch shift a full octave either way with the speed held steady
• Scrub and loop any selection, indefinitely
• Spectrogram and waveform, stacked, so you can see a voice-shaped event before you hear it
• Sweepable band filter with a one-tap speech preset (300-3400 Hz)
• Amplify and normalise, with a clipping indicator
• Noise reduction by spectral subtraction
• Reverse
• A/B against the untouched original, instantly

CAPTURE BUILT FOR LONG NIGHTS
One-tap record with a target you can hit in the dark. A live input meter and rolling waveform so you can see you are actually recording. Recording continues with the screen locked.

MARK IT WHILE IT HAPPENS
Tap MARK the moment you hear or feel something. It drops a timestamp you can jump straight to later, so a six-hour session does not become six hours of scrubbing.

LOSSLESS, ALWAYS
44.1 kHz, 16-bit, uncompressed WAV. Not adjustable, on purpose: a codec's artifacts are indistinguishable from the events you are listening for.

FINDINGS BECOME A DOCUMENT
Classify any region A, B or C on the published EVP convention, type what you hear, and it is saved with the audio. Findings are searchable across every session. Export a session report, a clip with your processing applied or untouched, or a 9:16 video for sharing.

BRING YOUR OWN AUDIO
Already own a recorder? Import WAV files from other gear and use the bench on those.

WHAT THIS APP DOES NOT DO
EVP Bench does not detect voices. It will never highlight, flag or suggest anything in a recording — that would be the app making a claim, and the app makes none. What listeners hear in noise is auditory pareidolia, the same mechanism that finds faces in clouds. Slowing audio down and looping it make that effect stronger, not weaker. EVP Bench is a microscope; what you conclude is yours.

PRIVATE BY CONSTRUCTION
Recordings are written to your device and stay there. No account, no cloud, no sync, no analytics, no ads. The app makes no network requests at all — nothing leaves it unless you share it yourself.

One purchase. No subscription.