Convert PDF to MID

Sheet-music PDFs may need conversion when a notation editor, sequencer, digital audio workstation, or hardware synthesizer requires MIDI events instead of page images. The conversion is a music-recognition task, not a normal document-format change.

What the PDF format is

PDF is a fixed-layout document format produced by Adobe Acrobat, Microsoft Word, LibreOffice, scanners, and music-notation software. It preserves page appearance across operating systems and is used for sheet music, manuals, invoices, forms, and scanned documents.

A PDF may contain vector notation, embedded fonts, or rasterized page images. These elements describe how a page looks; they do not normally contain MIDI note events. If the source project or a MusicXML file is available, use it instead of recognizing the PDF because it preserves musical structure more accurately.

What the MID format is

.mid is a filename extension for a Standard MIDI File. MIDI stores performance instructions such as note-on and note-off events, note numbers, velocities, tempo, program changes, controller data, and track assignments. It does not contain recorded audio, a synthesizer's sound, page layout, notation fonts, or the original score graphics.

MIDI can be played through software instruments or hardware synthesizers, edited in notation programs and digital audio workstations, transposed, given a different tempo, or separated into parts. The resulting performance is an interpretation of the printed score; articulation, dynamics, pedal marks, repeats, lyrics, and expressive timing may be lost or represented differently.

How to convert a PDF to MID

1. Choose music-recognition software. ScanScore and SmartScore are commercial desktop options that import sheet-music PDFs and export MIDI. PDFtoMusic and PDFtoMusic Pro can also interpret suitable digitally generated notation PDFs. Audiveris is a free, open-source OMR application; its practical workflow is usually PDF to MusicXML, followed by MIDI export in MuseScore.
2. Prepare the source. For scanned pages, use a straight, sharply focused image at about 300 dpi or higher. Crop borders and deskew pages when necessary. Remove heavy shadows, handwritten marks, and background noise where the software allows it.
3. Import and recognize the score. Open the PDF with the application's File → Open or PDF-import command, then run its optical music recognition (OMR) process. OMR converts visible clefs, notes, rests, rhythms, key signatures, time signatures, voices, and markings into editable musical data.
4. Correct the recognition. Inspect every page and part for wrong pitches, note values, ties, tuplets, rests, voices, transpositions, instrument assignments, tempo changes, repeats, and missing measures. MIDI export does not correct recognition errors.
5. Export MIDI. In software with direct output, use File → Export, choose MIDI, and save a filename such as score.mid. If using Audiveris, export .musicxml, open it in MuseScore, correct the notation, then use File → Export and select MIDI.

Online and mobile options

PlayScore 2 can import PDF or photographed sheet music and export recognized notation or MIDI on supported platforms; exact export features can depend on the current plan and app version. It is useful for a quick conversion, but desktop OMR software generally provides better page-by-page correction for large or complex scores.

Upload only scores you are authorized to process. A cloud service may retain uploaded files under its privacy terms, and generic PDF-conversion websites cannot infer musical events from an ordinary text, invoice, or scanned-document PDF. Such sites may reject the file or produce an unusable result.

Quality and compatibility limits

• Recognition is least reliable with low-resolution scans, skewed pages, dense orchestral layouts, handwritten notation, multiple voices, guitar tablature, grace notes, cross-staff notation, unusual symbols, and extensive editorial markings.
• A notation-generated PDF is not automatically easier to convert: the PDF may contain only rendered page artwork. Direct access to the notation application's project file or MusicXML is preferable.
• The exported MIDI uses the receiving program's instruments or sound bank. It will not reproduce the source recording, original piano or orchestral timbre, effects, lyrics styling, or printed page appearance.
• Review tempo, transposition, dynamics, sustain-pedal data, fermatas, repeats, and pickup measures after export. OMR programs differ in how they encode these details, and some omit them.
• Standard MIDI Files commonly use format 0, which combines events in one track, or format 1, which keeps synchronized parts on separate tracks. Choose format 1 when instrument or part separation matters; confirm that the destination application supports the selected format.