01
Learners who can't read fluently yet
Hear the melody before you try to play it. A reference makes the rhythm and the pitches concrete while reading is still slow.
Sheet Music to Audio Converter
Upload a PDF or photo of printed sheet music. Lacuna reads the notes, plays them back, and exports MP3 or WAV.
Examples
Sheet Music to Audio
Hear what the page sounds like
Upload a PDF or a photo of printed sheet music. Lacuna reads the notes, plays them back in your browser, and exports an MP3 or WAV you can practice with.
How it works
Sheet music to MP3 in three steps
1Step 1
Upload your sheet music
Add a PDF up to 25 MB, or PNG and JPG photos up to 5 MB each. One conversion takes up to 10 files and 50 pages. A flat, sharp, evenly lit page of printed notation reads best.
2Step 2
Lacuna reads the notes
Optical music recognition turns the printed staves into pitches, rhythms, and rests. Open Review recognized score to compare the result with your page.
3Step 3
Listen, then download the audio
Press play to hear the score; listening is free. Download MP3 for practice and sharing, or WAV for editing, with export access. MIDI, MusicXML, and a score PDF come from the same conversion.
What you get
A reference recording of the page in front of you
The audio is rendered from the recognized notes, so you can check what was read before you rely on it.
Play it before you download it
The recognized notes open in a MIDI editor in your browser. Press play and follow the playhead, slow the tempo for a hard passage, or change the instrument. Audio exported from the editor includes your edits; Download MP3 in the top bar renders the notes as they were recognized.
Check the reading against the page
Recognition is a first draft. A dense chord, a faint accidental, or a tie across a line break can be read wrong, and you hear it as a wrong pitch or a note cut short. Compare the recognized score with your page and correct what is off before you export.
MP3 for practice, WAV for editing
Both files are rendered in your browser from the recognized notes with a sampled instrument library: MP3 at 192 kbps for a phone or a group chat, WAV at 16-bit, 44.1 kHz for a DAW or a video project. It is a clean reference for pitch and rhythm, not a recording of a performance.
The same conversion goes further
The recognition that gives you audio also gives you MIDI for a DAW, MusicXML for a notation editor, and a clean score PDF. Make a song from this melody builds a full arrangement around it.
Who it's for
For anyone who needs to hear a score, not just read it
Printed standard notation works best: piano pieces, lead sheets, vocal and instrumental parts.
02
Choir and ensemble members
Turn the score you were handed into a rehearsal track for the days between sessions. Where parts were recognized as separate tracks, solo or mute them in the editor to bring your own line forward.
03
Teachers preparing a lesson
Make a reference recording of an exercise or a short piece so students can listen at home and arrive knowing how it goes.
04
Arrangers checking a printout
Have the PDF but not the project file? Play the page back and listen for a wrong accidental or a missing bar before rehearsal.
FAQ
Sheet music to audio questions
Upload a PDF or a photo of the score, sign in, and start the conversion. Lacuna recognizes the printed notes and opens them in an editor where you can press play. When it sounds right, download MP3 or WAV.
Yes. Scan the page or photograph it with your phone, upload the image or the PDF, and Lacuna plays the notes it recognizes. A flat, sharp scan at 300 DPI or higher reads best; a blurry or angled photo may not be read.
Yes, when the PDF is printed sheet music. Lacuna works as a PDF to music converter for scores: it reads the notation on each page and plays it back. A PDF with only lyrics or chord names has no staves to read.
PDF files up to 25 MB and PNG or JPG images up to 5 MB each. One conversion takes up to 10 files and 50 pages. A password-protected PDF can be unlocked in your browser before it is uploaded.
Yes. Every conversion can be exported as MP3 at 192 kbps or as WAV at 16-bit, 44.1 kHz stereo. Both files are rendered in your browser from the recognized notes.
No. It is synthesized from the recognized notes with a sampled instrument library. It gives you the pitches and rhythms on the page, without the phrasing, dynamics, and timing a performer would add.
Recognition needs an account and costs 30 credits per page. New accounts include free credits, and recognition is included on the Ultra plan. Listening to the result in your browser is free. Downloading the MP3 or WAV needs export access, the same access that covers the MIDI, MusicXML, and score PDF files: it is included with paid plans, or you can unlock a single conversion with a one-time purchase.
It is built for printed standard staff notation. Handwritten scores, guitar tablature, and numbered notation are not supported, and a small, blurry, or heavily compressed image may not be read. A scan at 300 DPI or higher works best.
When the page has no numeric tempo marking, playback uses 120 BPM. When a repeat cannot be expanded safely, the audio follows the written notes once at that mark and a notice is shown. You can change the tempo in the editor and export audio from there.
Each page is recognized on its own and the pages play back in order as one piece. Context that is printed only once, such as a time signature on the first page, is not carried over to later pages, so listen closely at the page joins. If a page cannot be read, the audio is made from the pages that were recognized.
Related tools
Before and after the audio
Turn a page of notes into something you can hear
Upload a PDF or a photo, listen to the recognized notes, and download MP3 or WAV.