Listening field note
Can a browser seek local audio while reviewing a transcript?
Yes. A user-selected audio or video File object can be played from a temporary blob URL and sought to recorded segment times, while remaining unavailable after reload unless the user explicitly relinks it.
Do not persist the media object
Browser file handles and object URLs are not a reliable or portable project archive. Store only bounded metadata if useful. Write the decision in plain language and retain the original source separately so the index can be audited against something outside the browser project.
Match intentionally
A filename and duration can help the human confirm selection, but the app should not claim that media and transcript correspond. Review the result as a retrieval aid rather than a conclusion. Human-authored fields must remain visibly distinct from exact source-derived text.
Respect playback differences
Codec support, autoplay rules, large-file behavior, and seeking accuracy vary by browser and file format; test representative devices. Carry the limitation into the frozen edition and passive handoff so a recipient can understand what was checked, what was not checked, and what remains their responsibility.