To convert a song to MIDI, upload the audio to an audio-to-MIDI tool and let it transcribe the notes it hears into a MIDI file you can open in any DAW. The tool detects pitch and timing across the recording and writes out the corresponding notes, so you get an editable part - melody, bassline or chords - instead of a fixed audio file. It is transcription, not magic: you get a strong, editable starting point, not a note-perfect score.
What "audio to MIDI" actually means
Audio and MIDI are two completely different things. Audio is a recording of sound - a waveform. MIDI is a set of instructions: which note, how hard, when it starts, how long it lasts. When you convert audio to MIDI, a model listens to the recording, works out the pitches being played and when, and writes those out as notes. Nothing about the original sound is carried over - only the performance, as notes. That is exactly why it is useful: once it is MIDI, you can change the instrument, fix a wrong note, transpose it, or rebuild the part from scratch.
What can you do with the MIDI?
- Re-instrument a part. Take a piano melody and play it back as a synth, a guitar, or strings.
- Learn a part. See the notes on a piano roll to understand how a melody or bassline was played.
- Rebuild and remix. Grab the chords of a track and write something new over them, or replace the bassline entirely.
- Fix and quantize. Nudge timing, correct a stray note, or tighten a performance to the grid.
- Sketch faster. Hum or play an idea, convert it, and keep building in MIDI.
How accurate is audio to MIDI?
Accuracy depends heavily on what you feed it. The cleaner and more monophonic the source, the better the transcription.
- Single melodies and basslines (one note at a time) transcribe very well - these are the strongest results.
- Chords and polyphonic parts (many notes at once) come out as a solid draft that usually needs a little cleanup.
- A full, dense mix transcribed as one lump is the hardest case - too much is happening at once.
- Drums are not pitched, so pitch-based transcription skips them.
The single biggest thing you can do for accuracy is separate first. Instead of transcribing a whole mix at once, split it into stems and transcribe each part on its own. A lone vocal, bass, or instrument stem gives the model a clear, single line to read, and the MIDI comes out far cleaner. This is the same stem separation that powers pulling an instrumental or acapella out of a song.
How to convert a song to MIDI, step by step
- Pick your source. A dry, single-instrument recording (a bassline, a lead, a piano) gives the best result. If you only have a full song, plan to separate it first.
- Upload it to an audio-to-MIDI tool like Sauce's Song to MIDI.
- Choose whole-track or per-instrument. Whole-track transcribes the file as one part. Per-instrument separates the song first and gives you vocal, bass and instrument MIDI as their own files.
- Preview the result. Good tools show you the notes on a piano roll and let you play them back with any instrument before you commit.
- Download the .mid and drag it into your DAW.
- Clean it up. Quantize timing, remove any stray notes, and re-voice chords to taste. Treat the MIDI as a fast starting point, not a finished part.
Why the result needs a little editing
Transcription reads pitch and timing, but it does not know your musical intent. It might split a held note into two, guess an octave, or add a passing note that was really just a bit of noise or reverb. None of that is a dealbreaker - it is a couple of minutes of tidying in the piano roll, and you still saved yourself the work of ear-transcribing the whole part by hand. Set your expectations at "90 percent there, editable," and audio-to-MIDI becomes one of the fastest ways to get an idea out of a recording and into your session.
Want to try it? Convert any track with Song to MIDI - preview the score in your browser, audition it with any instrument, and download the MIDI for melody, bass and chords.