Free MP3 and Audio to MIDI Converter
Convert MP3 to MIDI online, or turn a WAV, M4A or whole song into editable MIDI notes. No signup, full-length download, and your file never leaves your browser.
Drop an audio file anywhere on this panel
MP3, WAV, M4A, FLAC, OGG or an MP4 video, up to 10 minutes
Converted on your device, never uploaded
What to expect on real recordings
We ran these openly licensed studio recordings through MidiSnap and checked every note against a hand-made answer key. The meter shows how many detected notes were right, out of ten. Convert any of them above to hear the MIDI.
Solo piano
Chopin, Prelude Op. 28 No. 4, from Saarland Music Data (CC BY 3.0)
9 in 10 rightFinds 86% of notesWorks wellGuitar solo
Funk solo from GuitarSet (CC BY 4.0)
9 in 10 rightFinds 92% of notesWorks wellGuitar chords
Bossa nova chords from GuitarSet (CC BY 4.0)
9 in 10 rightFinds 70% of notesWorks, some cleanupSinging
Clip 22 from vocadito (CC BY 4.0)
6 in 10 rightFinds 58% of notesRough draft, expect edits
How to convert MP3 to MIDI
Add your MP3
Drop an MP3, WAV or other audio file, or pick a sample. Nothing is uploaded.
Tell us what it is
Piano, guitar, voice or auto. This tidies the notes for that sound.
Listen and adjust
Play the MIDI against the original. Slide for fewer or more notes.
Download the MIDI
Set the tempo, then drag the .mid file into your DAW.
Which audio converts well to MIDI
Good results
- Solo piano, from classical to pop covers
- Guitar leads, riffs and bass lines
- Single-note synth, flute, violin or sax lines
- Clean WAV exports and voice memos of one instrument
Needs cleanup, or not yet
- Strummed guitar chords (some notes go missing)
- Singing and humming (pitch drifts; about 6 in 10 notes right)
- Full songs with drums, bass and vocals together
- Drums and percussion (not detected)
Why musicians use MidiSnap
- Full length, no signup
- No 30-second previews and no weekly limit. Convert up to 10 minutes at a time.
- Private by design
- Conversion runs in your browser, so your recordings stay on your device.
- Fewer stray notes
- Tuned settings cut the ghost notes that make raw audio to MIDI output hard to use.
- Hear it first
- Compare the MIDI with the original, alone or together, before you download.
- Tempo that fits your DAW
- The tempo you set is written into the file, and pitch bends are left out so notes stay in tune.
- Honest about limits
- Clear recordings of one instrument work best. We show you where it struggles.
MP3 to MIDI and audio to MIDI, explained
An MP3 stores sound. A MIDI file stores notes: which key, when, how long and how hard. Converting audio or music to MIDI means listening to the recording and writing down those notes, so you can change the instrument, fix a wrong note or move the melody to another key in your DAW. An MP3, a WAV file and the sound of a video all go through the same steps.
A neural network, Spotify's open-source Basic Pitch, listens to short slices of the recording and estimates which pitches are sounding and where new notes begin. MidiSnap turns those estimates into notes with settings we tuned on real recordings, which removes most of the faint overtone and fragment notes that make raw output messy.
Because overtones and reverb can look like extra notes, no converter is perfect. That is why MidiSnap's MP3 to MIDI converter lets you slide between fewer and more notes, keep one note at a time for melodies, and snap notes to a grid once the tempo is right.
MP3 and audio to MIDI questions
How accurate is the MP3 to MIDI conversion?
On clear solo piano and single-note instruments, about 9 in 10 notes come out right in our tests on real recordings. Strummed guitar gets about 8 in 10, and singing about 6 in 10, so expect to fix a few notes in your DAW. Full songs with drums and many instruments are much harder for every converter.
Is WAV to MIDI or MP3 to MIDI better?
WAV to MIDI is slightly cleaner because nothing was lost to compression, but a good MP3 (192 kbps or more) gives almost the same notes. What matters far more is how clearly one instrument or voice stands out in the recording.
Can I convert a whole song to MIDI?
You can try, but a full mix turns into a busy MIDI file because every instrument is detected at once, so the melody is mixed in with chords and bass. For a clean result, use a recording where one part is in front, such as a piano cover, a guitar lead or an isolated vocal. Full song mode, which first splits the song into vocals, bass and the rest, is coming soon.
Can I turn my voice or humming into MIDI?
Yes. Pick "Voice / melody" after the conversion so only one note is kept at a time. Singing is harder than instruments: in our tests about 6 in 10 notes come out right, so plan to fix a few in your DAW. Humming a steady, clear pitch helps.
Does it detect chords?
It detects the individual notes of a chord, not chord names. Piano chords come through well; strummed guitar chords are harder because the strings ring into each other, so some notes may be missing.
Does it work for drums?
Not yet. The note detector listens for pitched notes, so drums and percussion are mostly ignored. Drum to MIDI is on our list.
Is it really free? Do I need an account?
Yes, MP3 to MIDI conversion here is free with no account. You can convert files up to 10 minutes long and download the full MIDI file every time.
Is my audio uploaded anywhere?
No. The note detection runs inside your browser on your own device, so your MP3 never leaves your computer or phone. That also means there is no queue and no size-based fee.
What does the MIDI file contain?
Note pitches, start times, lengths and loudness (velocity), plus the tempo you choose. It opens in any DAW or notation app, such as Ableton Live, FL Studio, Logic Pro, GarageBand, Cubase, Reaper and MuseScore.
Why is the tempo only a guess?
MIDI works best when the project tempo matches the recording, but tempo detection is often off by half or double. MidiSnap suggests a tempo and gives you ÷2, ×2 and tap buttons to set it. The notes keep their timing either way; the tempo only decides where the bars fall.
Which files can I use?
MP3, WAV, M4A, FLAC and OGG audio, and MP4 video (the sound track is used), in any browser that can play the file. Turning an MP3 file to MIDI and a WAV file to MIDI work exactly the same way.