A clean single instrument
Try a short phrase first. Midilace and Spotify Basic Pitch both let you inspect a downloaded MIDI. Check the note starts and pitches before using the part in a song.
BUYER'S GUIDE · CHECKED OCTOBER 15, 2026
Best audio to MIDI converter: choose for your recording.
For a short, clear single-instrument file and a downloadable MIDI without a paid plan, start with Midilace or Spotify Basic Pitch. If you need a free weekly full-file allowance, check AI-MIDI; if you need sheet music as well as MIDI, check Songscription's paid export plan. No tool here is proven most accurate for every recording.
Midilace is our tool. We checked each other product's own pages on October 15, 2026; we did not run one audio file through all four products. The downloadable test below is a Midilace test only.
What each option actually lets you do
On a phone, swipe the table sideways to compare the tools.
| Tool | Best fit from confirmed features | Free MIDI download |
|---|---|---|
| Midilace | Browser conversion for a clear audio file; processing and MIDI download run on your device. An actual five-note result is shown below.Official tool · checked Oct 15, 2026 | Available from this site's tool; no account or paid plan.Official tool · checked Oct 15, 2026 |
| Spotify Basic Pitch | Record or upload a single instrument; Spotify's demo also describes pitch-bend detection.Spotify demo · checked Oct 15, 2026 | Its demo offers a MIDI download and describes the tool as free.Spotify demo · checked Oct 15, 2026 |
| AI-MIDI | Preview an MP3, WAV or recording before choosing to spend an allowance on the full file.AI-MIDI homepage · checked Oct 15, 2026 | One full MIDI per week on its Free plan; free plan maximum is 5 minutes and 50 MB. Sign-in is required to download.AI-MIDI pricing and homepage · checked Oct 15, 2026 |
| Songscription | Audio transcription with sheet music and MIDI outputs; its MP3 page describes instrument isolation and piano hand splitting.Songscription tool page · checked Oct 15, 2026 | Free 30-second transcriptions, but its plan comparison lists MIDI export under paid plans, not Free.Songscription pricing · checked Oct 15, 2026 |
These are feature and download rules, not a ranking by transcription accuracy. AI-MIDI requires sign-in to download. Spotify Basic Pitch's demo page does not state whether sign-in is required. Plan terms can change after the date shown.
Match the converter to the job
A long file on a free allowance
AI-MIDI's published Free plan offers one full MIDI download per week, with a 5-minute and 50-MB limit. Check the file before spending the weekly download.
Notation as well as MIDI
Songscription publishes PDF, MusicXML and MIDI export on Plus and Pro. Its free 30-second transcription is useful to inspect, but the pricing table does not include a free MIDI export.
A full mix or layered chords
Do not treat any single-instrument test as proof for a dense song. Separate a source part if possible, or test a short section before paying for a full export. This page has no measured cross-tool accuracy result for mixes.
What our own converter exported
We made a synthetic 3.6-second WAV with five planned notes: D4, F4, A4, A4 and D5. On October 14, 2026, we ran that exact WAV through the live Midilace converter. The downloaded MIDI contained all five planned pitches but 12 note events in total, including short tails and two brief higher-octave events. That result shows why a converter's output needs inspection even when the intended pitches appear.
This is a synthetic signal, not a recorded instrument. It does not test real guitar attacks, piano pedal, chords or a full mix. We have not used it to award an accuracy score to any other tool.
What this comparison proves, and what it does not
- Product rules: read each provider's own demo, feature or pricing page on October 15, 2026. Each row above links to its source.
- Hands-on evidence: run the known-note WAV through Midilace, keep the exact input and downloaded MIDI, then inspect every event. The full audit is linked above.
- Unmeasured: no shared-file test across the other services, no controlled accuracy score, no promise about performance on your recording. If a plan, format or login rule is not established by its official page, treat it as unconfirmed.
Audio to MIDI converter questions
Is the best audio to MIDI converter always the most accurate one?
No single accuracy winner is established here. The source recording and whether you need a MIDI download, notation or separate instrument parts change the useful choice. Try a short owned sample and inspect its notes.
Can I download a MIDI file for free?
Midilace and Spotify Basic Pitch provide free MIDI downloads on their current tool pages. AI-MIDI lists one full free MIDI per week. Songscription's current plan table does not include MIDI export on Free. Sources and check dates are in the comparison table.
Does converting audio to MIDI preserve the original sound?
No. MIDI contains estimated note events, not the original recording. The playback sound depends on the instrument you assign in a MIDI editor or DAW.