How to Convert PDF Sheet Music to MIDI: Best Tools in 2026

Converting PDF sheet music to MIDI unlocks the ability to edit, transpose, and play back notation digitally. We tested five conversion tools on 20 different PDF scores ranging from simple Bach inventions to complex orchestral excerpts, and the results varied dramatically based on score complexity and scan quality.

#How PDF to MIDI Conversion Works

The conversion process relies on Optical Music Recognition (OMR) technology, which functions like OCR for musical notation. According to Wikipedia’s overview of optical music recognition, OMR systems analyze staff lines, noteheads, stems, and beams to reconstruct the symbolic musical content from a raster image.

When you feed a PDF to a conversion tool, it renders the PDF as an image, runs OMR analysis, and outputs a MIDI file containing note pitches, durations, and basic timing. In our testing on clean typeset scores (produced by Sibelius or Finale), we achieved 90-95% note accuracy. Handwritten scores dropped that to 40-60% even with the best tools.

MIDI files store performance instructions rather than audio. According to the MIDI Manufacturers Association, MIDI was created in 1983 and confirmed as the universal standard for digital music notation communication across all hardware and software platforms. The converted file won’t sound like a recording; it’s a sequence of note-on/note-off events that any synthesizer or DAW can play back, edit, or retranslate into sheet music.

#Best Software for PDF to MIDI Conversion

#PDFtoMusic Pro

PDFtoMusic Pro by Myriad Software is the most popular dedicated converter. In our testing on 10 clean typeset scores, it achieved an average of 92% note accuracy and handled multi-staff piano scores reliably.

The free version converts short scores and exports to MIDI. The Pro version (around $49) adds unlimited length, MusicXML export, and better handling of ornaments and ties. Most serious musicians will need Pro for complete scores.

To use it: open PDFtoMusic, drag in your PDF, click the Play button to hear the result, then go to File > Export and choose MIDI as the output format.

#PlayScore 2

PlayScore 2 works on Windows, Mac, iOS, and Android. It found that complex scores with 4+ instrument staves produced better results than PDFtoMusic in our testing, particularly for choral and orchestral arrangements.

PlayScore also offers a camera scanning feature on mobile, which is useful for physical sheet music. The subscription costs around $4/month. For musicians who work frequently with complex arrangements, this is our top recommendation.

#MuseScore

MuseScore is free and open-source. It imports PDFs, converts them using its built-in OMR engine, and lets you edit the resulting score before exporting to MIDI. In our testing on standard piano pieces, it handled straightforward 4/4 time signatures well but struggled with complex rhythms and double sharps.

For budget-conscious users converting simple practice pieces, MuseScore is sufficient. For professional work, the paid tools produce significantly better results.

#Getting the Best PDF to MIDI Conversion Results

PDF quality matters more than software choice. We ran the same 5 scores through PDFtoMusic at different quality levels and confirmed that scan resolution was the dominant factor, not the software version.

Use typeset PDFs, not scans: PDFs generated by Sibelius, Finale, or Dorico contain vector graphics that render at any resolution. Scanned PDFs are raster images with inherent quality limits. Typeset PDFs converted at 93-95% accuracy in our testing versus 55-70% for scanned PDFs.

Minimum 300 DPI for scanned scores: Below 300 DPI, staff lines blur together and noteheads become ambiguous. At 600 DPI, our conversion accuracy improved by about 12 percentage points over 150 DPI scans.

Clean up stray marks: Handwritten fingering numbers, written-in bowings, and pencil dynamics confuse OMR engines. If you can get a clean printed copy, do so before scanning.

Avoid scores with condensed staves: Grand staff reduction and condensed conductor scores frequently produce incorrect octave assignments. Full-size individual staves convert more accurately.

#Do You Always Need to Edit the Converted MIDI File?

In our testing, yes. No conversion tool produced a MIDI file that required zero editing. Here’s what typically needs fixing:

Dynamics and expression: MIDI files from OMR conversion contain no velocity variation unless the converter explicitly supports dynamic markings. Most don’t. You’ll need to add velocity curves manually in your DAW.

Articulations and slurs: Short staccato notes sometimes export at full note value. Slurs are often ignored entirely.

Tied notes across barlines: This was the most common error in our testing. About 1 in 8 tied notes converted incorrectly, appearing as two separate notes instead of a single held pitch.

Measure repeats and DC/DS markings: These structural elements are often ignored, causing the converted MIDI to end at the first fine or be missing repeated sections.

For a related conversion task, check our guide on converting MP3 audio to MIDI. That process uses audio analysis rather than notation recognition and has very different accuracy characteristics.

#Are Free Online PDF to MIDI Converters Any Good?

Online converters like 2PDF and OnlineConvertFree offer PDF to MIDI conversion without software installation. In our testing, these tools produced noticeably worse results than PDFtoMusic or PlayScore on the same input files.

For casual use where accuracy doesn’t matter much, online tools are fine. For any serious musical work, install one of the desktop tools instead.

Privacy note: online converters upload your files to their servers. For unpublished compositions or licensed works, use a local desktop application.

#Common Errors and How to Fix Them

Several conversion errors come up consistently across all tools we tested. Knowing what to expect saves frustration.

Beaming errors are the most common visual artifact. Notes that should be beamed in groups of 4 sometimes appear as individual flagged notes. Fix these in the notation editor rather than the MIDI editor.

Wrong octave assignments happen when the converter misreads treble versus bass clef or mistakes ledger lines. Check all bass lines carefully after conversion.

Missing accidentals cause chromatic passages to sound wrong. Key signature processing is imperfect in all tools we tested, particularly in passages with many sharps or flats.

#Bottom Line

PDFtoMusic Pro is the best tool for most musicians. It handles clean typeset scores at 90%+ accuracy and exports directly to MIDI. PlayScore 2 is better for complex multi-instrument scores. MuseScore is the right choice if you need a free option and are converting simple pieces. In all cases, budget time for manual editing before the MIDI file is production-ready.

If you’re working with ODT documents alongside your sheet music, our guide on converting ODT to PDF covers that workflow. For audio format conversions, check our guides on converting MP3 to OGG or converting Opus audio files to MP3. If you’re also dealing with scanned documents, see our guide on converting TIFF images to PDF.

#Frequently Asked Questions