Full-quality stems. No account, no per-track fee. Same model and same 192 kbps (or lossless WAV) as the paid tier — tracks up to 15 minutes. This mp3 to midi converter stays mp3 to midi accurate because it detects pitch on each separated instrument on its own, not the whole mix at once.
By ShinobiTools Team · Last updated: August 2026
Most free MP3-to-MIDI converters run the whole song through one detector and hand you back a single track of notes — singer, guitar and piano all mashed together. Split your song here first and each part comes back as its own MIDI track: vocals, bass, guitar and piano separately, plus one combined file with all of them. It's an mp3 to midi app that works the same in a browser on a phone as on a desktop, and the free tier is an mp3 to midi free online conversion with no account — up to 7 minutes per song before the notes cost anything.
Turn your MP3 into MIDI free →A converter that reads the finished mix can only find one set of notes, so everything above a certain pitch — the singer, the lead guitar, sometimes even a high bassline — lands in whatever single track it defaults to. StemGrab splits the song into stems first, so each instrument gets its own pass and its own track. We ran the same 30-second clip through both at once, on 20 August 2026:
| StemGrab | A typical free MP3-to-MIDI tool | |
|---|---|---|
| Separate tracks | 5 | 3 |
| The sung melody | Its own track — 63 notes across 15 semitones | Folded into one "piano" track with the backing — 301 notes across 44 semitones |
| Bass | Its own track, 75 notes | Its own track, 135 notes |
| Drums | Left out — see below | 80 notes |
| Notes found in total | 484 | 516 |
Fewer total notes isn't a downside here — it means the melody you actually want isn't buried under everything else that happened to share its pitch range.
Want the audio stems instead of, or as well as, the notes? They come from the same upload — see split a song into tracks. The download is standard .mid, so whether you need to convert to MIDI format for a DAW or for notation software, there's nothing more to do. It converts audio to MIDI only; it doesn't take MIDI files in.
Converting audio to MIDI means detecting pitch — which note, how loud, how long. Drums don't have a pitch to detect: run the same detector on an isolated drum stem and it returns mostly noise, around 10 stray notes on ours, nowhere near a real drum part. Rather than ship a MIDI file that's basically empty and call it "drums", we leave drums out of the download entirely. The separated drums are still there as an audio stem — they just don't get converted to notes.
To convert MP3 to MIDI, or convert audio in another format, drop the audio file in; WAV to MIDI works just the same, and M4A, FLAC, AAC and OGG go into the same box with no conversion first. Each separated stem then gets its own pass to detect pitch, on our GPU rather than your device, so as an online MP3 to MIDI converter or online MP3 MIDI converter nothing runs locally. That's why the vocal melody doesn't get tangled with the guitar line, and why the piano stem gives chords as well as the top line. For singing, the vocal stem becomes its own MIDI track once the voice is split away from the instruments, which is handy for writing down a melody you hum.
It isn't a general MP3 converter or free MP3 converter for other formats: as a music converter MIDI files are all you get, in a format any music program opens. As an MP3 to MIDI converter it reads each stem separately, which is how to transcribe audio into notes more accurately than from the whole mix. Clean studio recordings give the detector more to work with than a noisy phone recording, and as a sound to MIDI converter it returns mostly noise on speech. Each song counts as one of your 10 free splits a day; the notes are free under 7 minutes, and a pass only raises that length cap to 20 minutes. Longer song? Trim the part you need with the audio cutter or any audio editor first.
Yes — no account, no watermark. Splitting is free for songs up to 15 minutes. Turning those stems into notes is free up to 7 minutes per song, and a €5 ShinobiTools pass raises that to 20. The result, MIDI included, stays downloadable for 45 minutes (24 hours with any pass, paid or free) before it's cleared automatically.
Drop your track in, wait for the stem separation, then click Get MIDI. Each instrument comes back as its own .mid file, plus a combined file — no account and no software to install. That's how to convert a song to MIDI notes, part by part.
Five MIDI files — vocals, bass, guitar, piano and other — plus one combined file with each of them on its own track, so multiple instruments come back from one upload in the same pass. The bass file is handy for learning a bassline note for note. No drums track; see why above.
Drums don't have a pitch, and this converts audio to notes by detecting pitch. Pointed at an isolated drum stem it finds mostly noise, so instead of a near-empty file we leave drums out of the MIDI entirely. The separated drums are still there as audio.
Any standard .mid file works in a DAW (Ableton, Logic, FL Studio, GarageBand), most notation software, or a plain MIDI player — no plugin or extra software needed. If a note needs correcting, fix it in the DAW's piano roll; this page only exports what it detects.
No — it converts audio (MP3, WAV, FLAC and so on) to MIDI, not the other way around. To convert a MIDI file to MP3 you need a DAW or a MIDI player that can export audio.
Just the notes here. For the tempo, the BPM finder reads that from the same file separately, in about two seconds.
No, and you don't need one: you use it in the browser, the separation runs on our own server, and the upload is deleted right after processing and the stems within 45 minutes (24 hours with a pass).
No. Your upload is deleted the moment it's processed and the stems are wiped from the server within 45 minutes (24 hours with any pass, paid or free — that longer window is part of what the pass is for). Nothing is shared or used to train anything — see privacy.
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