Convert Audio to MIDI Online

Turn a recording into an editable MIDI file. NutifAI listens to your audio, detects the notes and their timing, and gives you a standard .mid file that opens in any DAW, notation editor, or practice app.

Upload a song — it's free to start

Supported formats: MP3, WAV, FLAC, M4A, AAC, OGG (Max: 50MB)

What you get

  • Accepts MP3, WAV, FLAC, M4A, AAC, and OGG files up to 50MB.
  • Detects notes — including chords and polyphonic material — using AI pitch detection.
  • Analyzes tempo and key so the MIDI lines up with a sensible grid.
  • Exports standard MIDI that works in every major DAW and notation editor.
  • Review suspicious or all detected notes, audition the source audio, and correct pitch or octave before using the MIDI elsewhere.
  • Can isolate a single instrument first (Bass, Drums, Guitar, Piano, and Vocals) so the MIDI follows one part instead of the whole mix.

Practice with the visualization

After generating a compatible generated visualization, open it in Practice Mode to practice difficult sections with manual A/B loops and playback speed control.

  • Follow the visualization inside the Practice Mode window.
  • Control audio and visualization playback independently.

Score visualizations can also loop individual measures or contiguous measure ranges when measure information is available.

How it works

  1. 1 Upload an audio file from your computer or phone.
  2. 2 The AI analyzes tempo, key, and instrumentation, separating stems when needed.
  3. 3 Processing runs in the background — you can watch the progress live.
  4. 4 Download the MIDI file, or keep going and generate sheet music from the same transcription.
Try it now

Frequently Asked Questions

Yes. Upload an MP3 (or WAV, FLAC, M4A, AAC, OGG) and NutifAI transcribes it to a standard MIDI file you can download and edit.

The AI handles polyphonic material, so chords are detected. Full-band mixes are harder: for best results on a mixed song, isolate the instrument you care about first with stem separation, then transcribe that stem.

AI transcription is a strong starting point, not a finished score. Clean recordings of a single instrument transcribe far better than dense, heavily produced mixes, and you should expect to tidy up timing and the occasional wrong note afterwards.

Every account starts with free credits (1 credit = 1 second of audio). Optional credit packs support the service once the free allowance is used up.

Related tools

Audio to Sheet Music

Generate sheet music from audio with AI. NutifAI transcribes MP3, WAV, and other recordings and exports the result in PDF, MIDI, MusicXML, and LilyPond source.

Transcription Review

Review detected notes from an audio transcription, audition the original recording, and correct pitch, octave, or false notes before exporting music.

Piano transcription

Transcribe piano from audio with AI. Export the result as PDF, MIDI, MusicXML, and LilyPond source. Compatible visualizations can also be opened in Practice Mode with manual A/B loops and speed control.

Vocal Remover & Stems

Remove vocals or isolate instruments from any song with AI stem separation. Download the instrumental, the isolated vocal, or individual stems: Bass, Drums, Guitar, Piano, and Vocals.