# 666ab731.wav download audit ## Result The file supplied as `666ab731.wav` is not a damaged WAV and cannot be repaired by changing its extension or codec. It is an HTML response from the current Instaudio front page. It has no `RIFF` / `WAVE` container header and no audio bytes to inspect with a spectrogram. The retained 2017 page proves that the historical upload was a separate 1:53.152 WAV at `https://instaudio.s3.amazonaws.com/live/private/7fa2c325c0a7395c8856c5bb4f11b5616c6f60c5.wav`. The 27 July 2026 saved S3 headers return `HTTP/1.1 404 Not Found`. The original bytes remain unrecovered; the repository's playable file is therefore a separately labelled timing-only reconstruction from the published duration transcript. ## Supplied download - Path: `solution/audio/666ab731-download-20260727.html` - Bytes: `4210` - SHA-256: `0cf90f82f54107abaa176ae8f67db0415ace997aa01f30a4244f80de710cd143` - Initial bytes: `` - HTML title: `Instaudio Audio Hosting - Share your audio quickly and for free` - RIFF/WAVE header: `False` ## Historical page - Saved HTML: `solution/audio/instaudio-page-20170705.html` - SHA-256: `13d9286f92aebb49dda8e6a8d94112ead65912598c4bb1b84576b2aef53004cc` - Page title: `666ab731 - Instaudio` - Advertised download name: `666ab731.wav` - Advertised duration: `113152 ms` - Advertised size: `1.73 MB WAV` - Memento: ## Boundary HTML content cannot be transformed into the missing WAV. A recovered copy would need to begin with a valid RIFF/WAVE header and have independently verifiable bytes; until then it is incorrect to call the reconstruction the original recording.