Voices from the other side, made locally
A ghost voice is usually an ordinary voice with its edges taken away: long reverb that smears words into a room that doesn't exist, a delayed echo answering itself, a lowered pitch for something large, or a raised one for something childlike. A touch of distortion adds the crackle of a bad recording.
Your recording is processed with the Web Audio API on your own device. Nothing is uploaded, and the recording disappears when you leave the page. Use the result for audio dramas, games, videos or a convincing voicemail for Halloween.