How to Convert Sheet Music to MIDI for Free [Complete Beginner's Guide]

What You Need to Know Before Converting Sheet Music to MIDI

"I want to import my sheet music into a DAW." "I want to digitize this score and rearrange it." — If you've ever thought this, you've probably run into the same wall everyone hits: sheet music is designed for human eyes, and DAWs speak MIDI — a completely different format.

This guide walks you through how to convert paper scores, PDF sheet music, and scanned images into MIDI data, focusing on free tools you can use right now. We cover everything from how OMR (Optical Music Recognition) technology works to step-by-step instructions and common pitfalls — so even if you're brand new to music production, you can get started today.

How Sheet Music-to-MIDI Conversion Works: What Is OMR?

The technology behind turning sheet music images into MIDI is called OMR (Optical Music Recognition). Think of it like OCR for text, but instead of reading letters, OMR analyzes a musical score and identifies notes, rests, time signatures, key signatures, and more — then converts them into digital data.

Thanks to recent advances in AI and deep learning, OMR can now handle even handwritten scores and complex piano parts with impressive accuracy. That said, results still vary significantly based on image quality, score complexity, and the tool you're using — so reviewing and correcting the output is always a necessary step.

The Conversion Workflow at a Glance

1. Scan or photograph your sheet music and save it as PNG, PDF, or JPG
2. Upload the image to an OMR tool
3. The OMR engine analyzes the score and generates MusicXML or MIDI data
4. Import the result into your DAW or MIDI editor and make corrections

Free Sheet Music to MIDI Converter Comparison

Here's a rundown of the main tools available for converting sheet music to MIDI — broken down into browser-based and desktop options.

① LA Studio Sheet Music OCR (Browser-Based, Free)

LA Studio's Sheet Music OCR tool lets you upload a score image directly in your browser and converts it into a MIDI region. The result loads straight into LA Studio's built-in DAW editor, so the entire workflow — convert, edit, export — happens without ever leaving your browser. No installation or account required to get started.

• Supported input formats: PNG, JPG, PDF
• Output: MIDI region (loads directly into the editor)
• Platform: Chrome/Edge (Windows, Mac, Chromebook)
• Price: Free for basic use (heavy AI processing consumes credits)

② MuseScore (Free, Desktop App)

MuseScore is a free, full-featured notation editor for Windows, Mac, and Linux. It doesn't include built-in OMR, but it excels at manual note entry, importing MusicXML files, and exporting MIDI. If you're willing to enter your score by hand, MuseScore is one of the best free tools for the job.

• Best for: Manual note entry, score editing, MIDI export
• OMR support: None (requires a separate OMR plugin)
• Price: Free (MuseScore.com streaming features require a paid plan)

③ Audiveris (Free, Open-Source, Desktop)

Audiveris is an open-source OMR engine built in Java. It delivers strong recognition accuracy and can handle complex piano scores and ensemble parts. The tradeoff: setup requires a Java installation and the interface has a steep learning curve. Output is MusicXML, which you can then convert to MIDI using MuseScore or similar tools.

• Best for: High-accuracy OMR, batch processing
• Drawbacks: Complex setup, less beginner-friendly UI
• Price: Completely free (open source)

④ SmartScore / PhotoScore (Paid, Desktop)

On the commercial end, SmartScore (by Musitek) and PhotoScore (by Neuratron) are the industry-standard OMR applications. They offer exceptional accuracy — including handwritten scores and multi-staff arrangements — but come with price tags in the hundreds of dollars. Best suited for professional music digitization workflows.

Quick Comparison

• LA Studio Sheet Music OCR: Browser-based, no install, free, integrates directly with DAW editor
• MuseScore: Great for manual entry and editing, no OMR, desktop app
• Audiveris: High-accuracy OMR, free, requires Java, advanced users
• SmartScore / PhotoScore: Professional-grade accuracy, paid (starts in the hundreds)

Step-by-Step: Converting Scanned Sheet Music to MIDI in Your Browser

Here's a practical walkthrough using LA Studio Sheet Music OCR — the easiest option for beginners.

STEP 1: Prepare Your Sheet Music (Scanning and Photo Tips)

Recognition accuracy is directly tied to image quality. Keep these points in mind when preparing your file:

• Aim for 300 dpi or higher. If you're using a smartphone, shoot straight down from above and make sure the lighting is even.
• Avoid shadows — shoot under consistent indoor lighting rather than near a window.
• Keep the page flat and level. A tilt of more than 10 degrees can noticeably hurt accuracy.
• PDF sheet music purchased from online stores can be uploaded directly — no scanning needed.
• For multi-page scores, either export each page as a separate image or compile them into a single PDF.

STEP 2: Open LA Studio Sheet Music OCR

1. Open Chrome or Edge and go to https://la-studio.cc/sheet-music-ocr
2. Click the "Upload File" button or drag and drop your score image onto the page
3. Supported formats: PNG, JPG, PDF

STEP 3: Let the AI Analyze Your Score

1. Once uploaded, the AI automatically begins identifying notes, rests, time signatures, and key signatures
2. Processing time varies by page count and complexity — a single A4 page typically takes 10–30 seconds
3. When analysis is complete, the result appears as a MIDI region in the editor

STEP 4: Review and Edit the MIDI in the Editor

1. The generated MIDI region opens in the piano roll view
2. Hit play to listen through and check for recognition errors — missing notes, extra notes, wrong pitches
3. Drag, delete, or add notes directly in the piano roll to correct any mistakes
4. Once you're satisfied, go to the export menu and download the MIDI file

STEP 5: Import into Your DAW (If Needed)

The exported MIDI file can be imported into any major DAW — Cubase, Logic Pro, Ableton Live, FL Studio, Studio One, GarageBand, and more. Look for "File → Import → MIDI" in your DAW's menu.

5 Tips to Improve Recognition Accuracy

Here's how to get better results from OMR and reduce the amount of manual correction needed:

1. Use printed scores, not handwritten ones. Typeset printed music is dramatically easier for OMR to read than handwriting.
2. Start simple. Practice with single-melody lines first, then work up to chords and full piano grand staff arrangements.
3. Don't crop the edges. Make sure the entire score fits in the frame when scanning — cut-off staves will confuse the recognizer.
4. Boost the contrast. If you have image editing software (Photoshop, GIMP, etc.), increasing contrast before uploading can meaningfully improve recognition.
5. Process in smaller batches. Rather than uploading an entire multi-page score at once, work through 1–2 pages at a time for more consistent results.

Post-Conversion Tips: Editing MIDI in Your DAW

Here are the most common issues people run into after converting — and how to handle them.

Check the Tempo and Time Signature

OMR can read time signatures, but figuring out the right BPM from a static score is much harder — so most tools default to something like 120 BPM. If you know the correct tempo, set it manually in your DAW. If you're not sure, use a BPM detection tool to analyze a reference recording.

Assign the Right Instrument

Converted MIDI tracks often default to a piano sound. If the original score was written for another instrument, swap in the appropriate virtual instrument in your DAW.

Adjust Velocity (Dynamics)

OMR conversion usually outputs all notes at the same velocity. Some tools recognize dynamic markings (f, p, mf, etc.), but for a more musical, expressive result, you'll want to manually shape the velocities in your DAW's piano roll.

Sheet Music OCR vs. Audio to MIDI: What's the Difference?

If your goal is to turn a recording into MIDI — rather than a score — you want Audio to MIDI conversion instead. This approach takes an audio file (WAV, MP3, etc.) as input and extracts the pitch data as MIDI. LA Studio's Audio to MIDI tool handles this directly in the browser using an on-device ONNX model (Basic Pitch) — no installation, no cost.

• Sheet Music OCR: Paper or PDF score → MIDI (best when you have a written score)
• Audio to MIDI: Audio recording or file → MIDI (best for transcribing recordings or capturing a performance)

Use whichever approach fits your starting material.

Common Problems and How to Fix Them

"The output is completely wrong and unusable."

→ Revisit your image: check resolution, straighten any tilt, and increase contrast. A dedicated 300 dpi scanner will produce far better results than a smartphone photo. Also keep in mind that handwritten scores push current OMR technology to its limits — printed music is strongly recommended.

"The notes are there, but everything sounds off-rhythm."

→ Tuplets (triplets, quintuplets), grace notes, ties, and slurs are among the hardest elements for OMR to read correctly. The most reliable fix is to go through the piano roll visually and correct these by hand.

"The grand staff (treble + bass clef) isn't being recognized properly."

→ Try cropping the treble and bass clef staves into separate images and uploading them one at a time. This often produces better results than processing the full piano grand staff together.

Conclusion: The Fastest Route Is Browser-Based Conversion

Converting sheet music to MIDI requires OMR (Optical Music Recognition) technology, and the quickest way to try it without installing anything is LA Studio's Sheet Music OCR tool. The entire workflow — upload, convert, edit, export — happens in one browser tab, making it the most accessible option for beginners.

Image quality is the single biggest factor in recognition accuracy: aim for 300 dpi scans, shoot straight-on, and ensure good contrast. After conversion, always review the result in the piano roll, correct any errors, and dial in the tempo and instrument settings before diving into your arrangement.

Frequently Asked Questions

Q. Can I convert handwritten sheet music?

A. Technically yes, but accuracy drops significantly compared to printed scores. Pencil marks and non-standard notation symbols are prone to misreading, so expect to do a lot of manual correction afterward. For best results, stick to cleanly printed music.

Q. Can I upload a PDF directly without converting it to an image?

A. Yes — LA Studio Sheet Music OCR and most other OMR tools accept PDF files directly. You can upload a PDF purchased from a sheet music retailer as-is. Note that password-protected or DRM-locked PDFs may not be processable.

Q. Can I use the converted MIDI straight away in my DAW?

A. Yes. The exported .mid file works with all major DAWs, including Cubase, Logic Pro, Ableton Live, FL Studio, Studio One, and GarageBand. You will need to manually set the tempo, adjust velocities, and assign instruments to taste.

Q. Can I convert a multi-page score all at once?

A. Most tools support multi-page PDFs, so yes. That said, longer scores take more processing time and tend to produce more errors. If accuracy matters, splitting your score into chunks of 2–4 pages will generally give you cleaner results.

Q. Can I do this entirely on my phone?

A. You can photograph your score with your phone's camera and upload it to a browser-based OMR tool — so the conversion itself is doable on mobile. However, reviewing and correcting MIDI on a small screen is awkward at best. We'd recommend doing the editing and cleanup on a computer whenever possible.