Convert MP3 to MIDI with AI
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Detected 0 notes
Each block is a note — time runs left to right, pitch bottom to top. Click anywhere to play from there.
Simple synth preview to check the notes — open the .mid in your DAW for real instruments.
No clear notes detected. The AI works best on a single instrument or voice — try trimming to a solo part with our Audio Cutter, or raise the sensitivity below.
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Downloaded! Open the .mid in GarageBand, FL Studio, Ableton or any DAW → Which apps open .mid?
What is an MP3 to MIDI Converter?
An MP3 to MIDI converter listens to a recording and writes down the notes it hears — turning audio into editable note data. MIDI isn't sound: it's the score. Once you have the .mid file, you can change the instrument, fix wrong notes, slow the part down to learn it, or build a whole new arrangement on top. This tool transcribes any audio — MP3, WAV, FLAC, M4A — into a standard MIDI file in seconds.
Most online converters upload your file to a server and run simple pitch detection that tracks one note at a time. AudioTrick runs a polyphonic neural network right in your browser — powered by Basic Pitch, Spotify's open-source AI model (Apache 2.0). It hears chords, catches vibrato and slides as pitch bends, and your audio never leaves your device.
How to Convert MP3 to MIDI
- Upload your audio — drop an MP3, WAV, FLAC, or M4A file. A clean recording of a single instrument or voice gives the best result.
- Let the AI transcribe it — transcription starts automatically and runs entirely in your browser. A typical song takes a few seconds.
- Tune the result — pick an instrument preset and drag the sensitivity slider. The piano-roll and note count update instantly — the AI doesn't need to re-listen.
- Download the MIDI — hit Download MIDI and drag the .mid file into your DAW.
What You'll Get — Honest Expectations
AI transcription shines on one instrument at a time: solo piano, a guitar riff, a sung melody, a bass line. Full-band mixes come out as a rough draft — usable as a starting point, but expect to clean it up in your DAW. Two more things worth knowing: drums and percussion don't transcribe to pitched notes (mute them first if you can), and heavy reverb smears note starts, so a dry recording always beats a washed-out one. If your song has a solo section, trim to it with the Audio Cutter first — it's the single biggest quality win.
MP3 vs MIDI — What's the Difference?
| MP3 (audio) | MIDI (notes) | |
|---|---|---|
| What it stores | The actual recorded sound | Which notes to play, when, how loud |
| File size | Megabytes per minute | Kilobytes per song |
| Editable notes | No — it's a finished recording | Yes — move, delete, transpose any note |
| Change instrument | No | Yes — same notes, any sound |
| Best for | Listening, sharing | Producing, learning, remixing |
Need the other direction — between audio formats like MP3, WAV, or FLAC? MIDI is not an audio format; use the Audio Converter for that.
Best Uses for Your MIDI File
Drag the .mid straight into GarageBand, FL Studio, Ableton or Logic to edit notes, change instruments, or build a remix. Learn a song by ear at your own pace — the piano-roll shows you exactly what's being played. Turn a hummed voice memo into a playable instrument line. Use the transcription as a starting point for sheet music via MuseScore. And if you just want the audio itself higher or lower, the Pitch Shifter transposes the recording directly — no MIDI needed.
Frequently Asked Questions
How is this different from other MP3 to MIDI converters?
Most online converters upload your file to a server and run simple monophonic pitch detection — one note at a time. AudioTrick runs Basic Pitch, Spotify's open-source polyphonic neural network, entirely in your browser: it hears chords, detects pitch bends like vibrato and slides, and your audio never leaves your device.
What is Basic Pitch?
Basic Pitch is an open-source AI model for audio-to-MIDI transcription, built and published by Spotify under the Apache 2.0 license. It's instrument-agnostic, polyphonic, and detects pitch bends — and it's small enough to run directly in a web browser, which is exactly what this tool does.
How accurate is AI audio-to-MIDI transcription?
On a clean recording of a single instrument or voice, very usable — most notes land with correct timing and pitch. Accuracy drops as the audio gets denser: full-band mixes produce a rough draft you'll want to clean up in a DAW. Use the sensitivity slider and instrument presets to tune the result.
Does it work on full songs?
You can try — the tool won't stop you — but expect a noisy result. The AI works best on one instrument at a time: solo piano, a guitar riff, a vocal line. For a full song, trim it to the part you need first, or expect to do cleanup in your DAW.
Can it transcribe chords, or just melody?
Chords too — Basic Pitch is polyphonic. It can hear several simultaneous notes, which is what separates it from classic pitch detectors that only track one note at a time.
What are pitch bends in the MIDI file?
Pitch bends capture the in-between movement of a note — vibrato, slides, guitar string bends. The AI detects them and writes them into the .mid file as standard pitch-wheel events, so your DAW reproduces the expressive movement, not just the note grid. You can turn them off in advanced settings.
Which DAWs and apps open .mid files?
Practically all of them: GarageBand, FL Studio, Ableton Live, Logic Pro, Cubase, Reaper, and free tools like MuseScore. Drag the downloaded .mid file into the project, assign any instrument, and the notes play. Double-clicking the file directly often won't make a sound — that's normal, MIDI needs an instrument to play through.
Why does my MIDI file show 120 BPM?
120 BPM is just the grid the file is written on — the actual timing of every note is preserved exactly in seconds. The notes will sound right at any tempo setting; they just may not align with your DAW's bar lines until you set the project tempo to match the song.
Can I convert WAV, FLAC, or M4A to MIDI?
Yes. Despite the name, the converter accepts MP3, WAV, OGG, FLAC, M4A, AAC, and WebM — anything your browser can decode. The output is always a standard .mid file.
Is the MP3 to MIDI converter free?
Completely free, no account, no watermarks, no limits on the number of conversions. The AI model runs on your own device, so there are no server costs to pass on to you.
What audio formats are supported?
MP3, WAV, OGG, FLAC, M4A, AAC, and WebM. The output is always a 320 kbps MP3 file.
Is my audio uploaded to a server?
No. All processing happens locally in your browser using the Web Audio API. Your files never leave your device.
How good is the audio processing quality?
We use the same techniques found in professional audio software: convolution reverb with real impulse responses, phase vocoder time-stretching, HRTF-based spatial audio, EBU R128 peak limiting, and LUFS loudness normalization. What you hear in the preview is exactly what you get in the export — we guarantee preview/export parity across every tool.