VCM Audio to MIDI Converter
Upload audio, get MIDI. Transcribe vocals, guitar, piano, or any melodic content into editable MIDI notes with pitch bend detection.
Drop your audio file here
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MP3, WAV, M4A, FLAC, OGG (max 25MB, 10 min)
Powered by Spotify Basic Pitch (Apache-2.0). We don't store your uploads. Files are deleted after processing.
Convert Audio to MIDI for Free
You have an idea in audio, but you need it in MIDI to edit, transpose, or re-instrument it. Traditional audio-to-MIDI conversion required expensive software or tedious manual transcription. This free tool uses machine learning to analyze your audio and extract the musical notes automatically.
Whether you're transcribing a vocal melody you hummed, capturing a guitar riff you played, or converting a piano recording into editable notes - this tool outputs standard MIDI files that work in any DAW including Ableton Live, FL Studio, Logic Pro, Pro Tools, Cubase, and more.
The converter detects not just the notes, but also pitch bends (slides, vibrato, bends). This makes the MIDI output sound more natural and expressive when played back, especially for vocals and string instruments.
How It Works
1. Upload Audio
Drop any MP3, WAV, M4A, FLAC, or OGG file. Up to 25MB and 10 minutes.
2. AI Transcription
Machine learning analyzes your audio frame-by-frame to detect notes and pitch variations.
3. Download MIDI
Get your MIDI file plus notes CSV and a sonified WAV preview.
Works With Any Instrument
Vocals
Solo singing, humming, melodies
Guitar
Riffs, leads, chord progressions
Piano
Melodies, chords, accompaniment
Other
Bass, synth, wind, strings
Features
Pitch Bend Detection
Captures vibrato, slides, and bends for natural-sounding MIDI output.
Polyphonic Support
Handles chords and multiple simultaneous notes, not just single melodies.
Notes CSV Export
Get raw note data (time, pitch, velocity) for custom analysis or scripting.
Sonified Preview
Download a WAV of the detected notes to hear the transcription before importing.
Privacy First
Audio is processed and immediately deleted. We don't store your files.
Fast Processing
Most files process in under 30 seconds. Up to 10 minutes of audio supported.
Honest Limitations
Audio-to-MIDI transcription is inherently imperfect. Here's what to expect:
Single instrument works best
Full mixes with drums, bass, and multiple instruments will produce messy results.
Vocals may need cleanup
Breaths, sibilants, and background noise can be detected as notes.
Polyphony is imperfect
Dense chords or fast arpeggios may have missing or extra notes.
No rhythm/tempo detection
MIDI will be at raw timings. Use DAW quantize to snap to grid.
Alternatives Comparison
| Tool | Price | Platform | Best For |
|---|---|---|---|
| VCM Audio to MIDI | Free | Web browser | Quick conversions, any device |
| Melodyne (Celemony) | $99-$699 | Desktop plugin | Professional editing, pitch correction |
| Ableton Live | $99-$749 | Desktop DAW | DAW users, integrated workflow |
| Logic Pro | $199 | Mac only | Mac users, integrated workflow |
This tool is web-based and free. Professional tools offer more accuracy and editing features. Results will vary - always expect some cleanup work.
Frequently Asked Questions
What is audio to MIDI?
Audio to MIDI conversion analyzes an audio recording and detects the musical notes being played, then outputs them as MIDI data. MIDI is a digital format that represents notes, timing, and velocity - allowing you to edit, transpose, or re-instrument the music in any DAW.
Can I convert MP3 to MIDI for free?
Yes, this tool is completely free. Upload any MP3 file (up to 25MB, 10 minutes) and get MIDI output with pitch bend data, notes CSV, and a sonified WAV preview - all at no cost.
Does it work for vocals?
Yes, the tool works well for monophonic vocal recordings (solo singing). Results are best when the vocal is isolated without heavy reverb or background instruments. Complex harmonies or choir recordings may produce messier results.
Does it work for chords and polyphonic instruments?
Yes, the tool supports polyphonic transcription (multiple simultaneous notes). Piano chords, guitar strumming, and similar polyphonic material can be transcribed. However, accuracy decreases with more complex arrangements.
Why is my MIDI messy or inaccurate?
Common reasons include: noisy audio, multiple instruments playing at once, heavy effects/reverb, very fast passages, or complex polyphony. For best results, use clean isolated recordings of a single instrument or voice.
What file types are supported?
We support MP3, WAV, M4A, FLAC, and OGG formats. Maximum file size is 25MB and maximum duration is 10 minutes.
Is my audio stored after processing?
No. Your uploaded audio is processed in memory and deleted immediately after conversion. Output files are temporarily available for download, then automatically removed. We don't store or analyze your audio beyond the conversion process.
How accurate is the transcription?
Accuracy varies depending on the audio quality and complexity. Solo instruments with clear recordings typically achieve 80-95% note accuracy. Polyphonic material and noisy recordings will be less accurate. Always expect to do some cleanup in your DAW.
How do I import MIDI into my DAW?
Simply drag and drop the downloaded .mid file onto a MIDI or instrument track in your DAW. In Ableton, drop it onto a track with an instrument. In FL Studio, open the Channel Rack and import. In Logic, drag to an arrangement track.
What's the best way to get cleaner MIDI results?
Use isolated recordings (vocals only, guitar only). Remove background noise and effects before conversion. Record at consistent volume. After conversion, use your DAW's quantize function to snap notes to grid, and delete obviously wrong notes manually.
Does it detect key signature or BPM?
This tool focuses on note transcription and does not directly detect key signature or tempo. You can use our separate BPM Finder tool to detect tempo before importing your MIDI.
What is pitch bend detection?
Pitch bend detection captures the subtle pitch variations between notes - like vocal slides, guitar bends, or vibrato. This data is included in the MIDI output, making the transcription sound more natural when played back.
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