Record or upload, in the browser
Hum straight into the mic or drop in an existing recording. No plugin, no install — the melody goes from your head to note data in one sitting.
Free MP3 to MIDI converter
Audio to MIDI: Hum It, Get Notes
Convert MP3, WAV, FLAC, OGG, M4A, or a microphone recording into a downloadable MIDI file in your browser.
Drag and drop your audio file here, or click to browse
Supported formats: .wav, .mp3, .m4a, .flac, .ogg, .webm
from sound to notes
What conversion really produces
Sing the melody, play the riff, or upload the recording — and walk away with MIDI notes you can edit, re-voice, and drop into any DAW.
The output is a draft score of what you performed — including the parts you didn't mean. Pitch drift becomes bent notes; a breath becomes a gap; that accidental grace note gets faithfully documented. The engine transcribes your performance, not your intention, which is why the editing pass afterward is part of the workflow, not an apology for it.
The connection to the built-in MIDI editor makes that pass immediate: detected notes open on a piano roll where wrong octaves, split notes, and loose timing get fixed in minutes, then exported as clean standard MIDI.
Musical ideas arrive faster than notation skills can catch them. This converter closes that gap: capture a melody by voice or instrument, and the transcription engine turns the audio into note events — pitches, start times, durations — that any editor or DAW understands.
Transcription rewards clarity. One melodic line, recorded close and clean, converts with startling accuracy; a full band mix asks the engine to untangle everything at once. Hum the idea alone and you'll spend your time arranging, not correcting.
Capture without friction
Pitch, timing, and dynamics
Notes come through with onset, duration, and velocity, preserving the shape of your phrasing rather than flattening it to a grid.
Straight into the editor
Open results directly in the MIDI editor to correct and arrange, then export standard MIDI files that load anywhere music software runs.
From voice memo to usable score
Treat conversion as capture plus cleanup. Both halves matter; only the first one is automatic.
- 1
Record one clear line
Get close to the mic, pick a quiet room, and perform the single melodic idea — no chords under it, no backing track behind it.
- 2
Convert and inspect
Run the transcription and read the piano roll against your memory of the melody. Check the octave first; it's the most common surprise.
- 3
Correct, then arrange
Fix stray notes and tighten timing where it matters, keep the human push-pull where it's the point, and export or keep building in the editor.
Who converts audio to MIDI
Writers who don't read music
The melody you hummed at a red light becomes notes a collaborator, an arranger, or a synth can play — no notation skills required.
Producers mining recordings
Pull the topline out of a voice memo or the riff out of an old demo, then re-voice it with any instrument in the DAW.
Students and teachers
See exactly what was played: pitches and rhythms visualized on a grid make transcription study and ear-training feedback concrete.
Getting accurate transcriptions
One line at a time
Monophonic sources — a hummed tune, a single guitar string, one synth lead — transcribe far more reliably than chords or full mixes. Convert parts separately and stack them in the editor.
Steady beats sloppy
The engine maps your timing faithfully, so a rushed performance produces rushed MIDI. Recording against a simple count or click makes the cleanup pass trivial.
Proof-listen on a neutral sound
Play the MIDI back on a plain piano before arranging. Errors that hide inside a lush pad jump out on bare keys.
Audio-to-MIDI questions
Can it convert a full song into MIDI?
It will attempt whatever you feed it, but polyphonic mixes come back as a dense approximation that needs heavy editing. For faithful results, convert the melodic line you care about in isolation — split stems first if needed.
How accurate is it on humming and singing?
Very usable: clear humming in a quiet room typically yields note-for-note melody capture with minor octave or onset corrections. Sung lyrics add consonant noise, so "la" or "doo" outperforms real words.
What format is the output?
Standard MIDI — the universal note format every DAW, notation program, and hardware workstation reads. Edit it here first or take it straight into your own tools.
Does it detect the key and tempo?
The transcription preserves your performed pitches and timing; interpretation stays in your hands in the editor, where you can quantize to a tempo and transpose to the key the project needs.
Catch the melody before it escapes
Hum it now, edit it in five minutes, keep it forever as notes. That idea deserves better than another forgotten voice memo.
Convert to MIDI