🔒 iPhone voice memos welcome · nothing uploaded

M4A to MIDI Converter

M4A (AAC) is what iPhones and Macs record by default — Voice Memos, GarageBand bounces, exported clips. If you hummed or played an idea into your phone, it is almost certainly an M4A, and converting that to MIDI is the fastest way to keep building it on a computer.

🎵 → 🎹

Drop an audio file to convert to MIDI

MP3 · WAV · FLAC · M4A · OGG — processed locally, never uploaded

⚙️ Advanced settings

Onset confidence 0.5 Higher = only clear note starts Note confidence 0.3 Higher = fewer, stronger notes Min note length 130ms Drops short blips Tempo 120 BPM Written to the MIDI header Include pitch bends (expressive, less clean)

⭐ 4.8 · free & unlimited · powered by Spotify's open-source Basic Pitch

This converter reads M4A and AAC directly in the browser, detects the notes with AI, and hands you a MIDI file. No format-juggling, no upload.

Built for voice memos

Capture an idea on your phone, drop the M4A here, and turn that humming or playing into editable notes in seconds.

No conversion dance

You don’t need to re-export the M4A to WAV first — the tool decodes Apple audio natively in your browser.

Keep ideas private

Unreleased song sketches stay on your device — the M4A is never sent anywhere.

How to convert M4A to MIDI

Add your file

Drag your M4A file into the converter, or click to browse. It loads locally — never uploaded.

AI transcribes

Basic Pitch detects the notes on your device and draws a live piano roll of the result.

Download MIDI

Save the .mid (and a piano-roll image) and open it in any DAW or notation app.

M4A to MIDI — FAQ

Can I convert an iPhone Voice Memo to MIDI?

Yes. Voice Memos export as M4A — drop that file straight into the converter and download the MIDI. Humming and single-instrument ideas work best.

Does it handle AAC too?

Yes. M4A files use AAC audio, and any AAC your browser can decode will convert.

Why does my hummed melody have extra notes?

Breath and room noise can trigger stray notes. Raise the onset and note confidence in Advanced settings, or increase the minimum note length to clean it up.