Export one immutable score revision. Returns file metadata, a scoped expiring download URL and a resource link. Deliver a file through a host-presented attachment, otherwise the prepared panel's Download menu; never paste or rebuild download_url in chat, and a resource link does not prove receipt. Formats: musicxml, midi, pdf, layout_pdf, mxl, wav, mp3, pages, parts, jianpu, jianpu_melody, jianpu_fixed, jianpu_voices, jianpu_fixed_voices, abc, mei, tab_text, original_pdf, original_scores, original_midi, original_musicxml, provider_evidence, editing_copy. editing_copy is the current MusicXML for your own round of edits saved back to the same score, on any score; it is not a download for the user; fetch it only to edit, once per round. A free score (access.open false) refuses musicxml, mxl, midi, abc, mei and the MIDI/MusicXML originals with locked=true until the user agrees to unlock it, and its PDFs and page images carry a small footer line; MP3/WAV are free. pdf follows the saved notation view; layout_pdf is staff. Parts shown as guitar TAB (set_tablature) appear in pdf, pages and parts, and musicxml/mxl carry their TAB staff for Guitar Pro or MuseScore; tab_text is plain-text TAB (one line per string, bars between |) returned in text to show in the chat, for the TAB parts or else the guitars and basses; part_id picks one part. Mirelo's original tablature PDFs (original_pdf) fret the written guitar pitch, so their guitar TAB can sit an octave high; prefer tab_text or pdf for guitar TAB. Numbered notation supports movable/fixed do, melody and voice variants. part_id selects a part; parts bundles staff formats for 1–32 bound parts. MIDI/audio require complete performance bindings; MP3/WAV synthesize score playback, not original separated stems. Supplier originals preserve original bytes and exclude later edits; unavailable originals remain unavailable, without new supplier calls.