Convert MP3 Audio to Editable MIDI Online
Transcribe your MP3 melodies, vocals, or instrument recordings into standard MIDI data with high-precision pitch tracking, editable piano roll, and instant download.
Upload your MP3 file
Drag & drop your file here, or click to browse (up to 25MB)
How to Use MP3 to MIDI Converter
Complete Illustrated Guide →- Upload or drag and drop your MP3 audio file into the workspace.
- Adjust detection sensitivity and minimum note duration to filter out noise or fine-tune transients.
- Click "Convert to MIDI" to run the pitch detection and note segmentation engine.
- Inspect and edit the generated notes in the interactive piano roll.
- Export and download your Standard MIDI File (.mid) or transfer directly to the BlackRatio Music Studio.
Key Capabilities
- Pure browser-based DSP: Your audio never leaves your machine
- YIN autocorrelation pitch tracking and spectral onset detection
- Interactive canvas piano roll with drag, resize, and velocity controls
- Configurable pitch bounds (A0 to C8) and quantize settings
- Full preview synthesis with acoustic piano simulation
Technical Specifications & Acoustic Limitations
Digital audio transcription operates via mathematical frequency tracking and pitch extraction. Clean, monophonic solo recordings with minimal reverberation yield the clearest note boundaries, whereas dense multi-instrument mixes with percussion, distortion, or heavy room ambiance may produce harmonic masking. We recommend reviewing notes in the interactive piano roll or score editor before exporting.
Frequently Asked Questions
Can this tool transcribe polyphonic chords and complex song mixes?↓
The engine is optimized for monophonic solos, melodies, bass lines, and clear instruments. Densely mixed commercial songs with loud drums or heavy distortion can be transcribed but may require minor adjustments in the built-in piano roll editor.
Is there a file size limit or cost?↓
BlackRatio Studio is 100% free. Standard files up to 25MB are supported and processed directly in your browser.