nspire · watermark forensics

Upload any audio. If an nspire watermark is present, this reports the delivery it came from — user, session and how the file was handed out — along with how far it has been pitched since. Audio is decoded in your browser; only raw samples are sent, and the audio is never stored.
drop a file here, or click to choose
wav · mp3 · m4a · flac · ogg
signal detail
Presence is how far the sync peak stands above the rest of the search surface. Unmarked audio scores about 2–4; a genuine mark clears 4 and usually sits near 5. Identification is matched against issued tickets, so a few bit errors are expected and harmless.