AI Song to Sheet Music and MIDI: A Full Score, Parts and Stems From One Song (Tested)

What you get from one song

Score & MIDI works on any song in your Tunely library. One run gives you:

• Full score (PDF): every instrument together, in concert pitch. Scores with more than 8 staves are set on A3 so they stay readable.
• One part per instrument (PDF): what a player puts on the stand. A part is written for each instrument with enough notes to read.
• MusicXML: opens in MuseScore (free), Sibelius, Dorico and Finale, so you can fix notes, add dynamics and print your own.
• Multi-track MIDI: one track per instrument with a General MIDI sound, drums on channel 10. It follows the song's own tempo, so the bars line up with the recording in a DAW.
• Instrument stems (MP3): up to 12 tracks — vocals, backing vocals, drums, bass, guitar, keyboard, strings, brass, woodwinds, percussion, synth and effects.
• A ZIP of the score files, to send the whole package to a band in one go.

What it found in a real song

We ran it on "Sommerregen", the German pop song that opens our German home page: piano, acoustic guitar, soft drums and a female vocal. It was generated with "98 bpm" in its style, which made a good check on our tempo reading.

The vocal part reads as a plausible melody you could sing from. Treat the busier parts — piano chords, strummed guitar, drums — as a draft to correct, not a part to sight-read.

Bar lines come from the song, not from a guess

Notes are only useful in a score if they land in the right bar. Before anything is written down, Tunely measures the song's own beats and bar lines from the audio and fits every note to them, rounded to the nearest sixteenth.

Generated songs are not always metronome-steady. Another home-page demo of ours drifts from 129 to 130.5 BPM over four minutes. The bar lines follow the real beats instead of sliding out of step, and the MIDI carries the same tempo changes, so it stays locked to the recording when you put both in a DAW.

Slow songs are a classic trap: a ballad's eighth notes pulse at twice its tempo, and a beat tracker can lock onto that pulse. When a song's style names its tempo, Tunely uses it to tell the two apart. 「晚风慢一点」 was made with "slow 70 bpm" in its style and is written at ♩ = 67 in 60 bars, not at 133 in twice as many.

The MIDI starts at bar 1. When a song has an intro or a pickup before its first downbeat, Tunely tells you where the song starts relative to bar 1, so you can line the two up.

What to check before you play from it

A transcription is a first draft. These are the places to look first:

• Rhythm spelling: notes snap to a sixteenth-note grid. Swing and triplets come out as straight sixteenths; re-notate them in MuseScore if the song swings.
• Dense chords: piano and strings are written as chords, with ties where notes overlap. Correct to play, busier to read than a hand-made part.
• Drums: one voice on a five-line drum staff (kick, snare, toms, hi-hat, cymbals). Hands and feet are not split into separate voices.
• Bleed between tracks: a separated track always carries a little of the others — on our test the bass track also "played" drums and pads. Tunely keeps only the notes that belong to each track's instrument, but a stray note can survive.
• Concert pitch: everything is written as it sounds. Transpose B-flat and E-flat instruments in your notation software.
• Octave clefs: guitar and bass carry a small 8 under the clef, so the notes sit where players expect to read them, without a forest of ledger lines.

How to get it, step by step

On a phone it is the same as on a computer:

• 1. Open your Library and find the song.
• 2. Tap the ••• button (Remix on a computer), then Score & MIDI.
• 3. Tap Create score · 6 credits and keep the page open. It takes 2 to 5 minutes (about 3 on our test song); credits are taken only once the files are ready.
• 4. Download the full score, the parts, MusicXML, MIDI or the ZIP. The instrument stems are listed underneath.
• 5. Open the MusicXML in MuseScore to correct and print. Opening Score & MIDI again on the same song shows the same files at no charge.

Rewriting one section without touching the rest

The teacher's other wish: keep a long piece but redo, say, minutes 5 to 7. In Tunely that is Fix a section, in the same Remix menu (Pro, 2 credits):

• Pick the part: 10 seconds to 2 minutes, and no more than half the song. The window snaps to bar lines and shows which bars it covers.
• Say how it should change, in your own words and language — "build up with strings, keep the tempo". New lyrics are optional.
• Tunely makes two versions — about two minutes — and keeps the one with the smoother joins as a new version of your song; the original stays in your library. Instrumental songs work too.

Why splice at all? When we measured the raw output, the model had re-rendered the whole song. Outside the chosen window it matched the original only weakly (a correlation of 0.46 to 0.55). So Tunely keeps just the new section and stitches it into the untouched original, at points where both play the same music. After the splice, everything outside the window was identical to the original, sample for sample.

Long pieces work the same way. A song longer than 8 minutes, an imported song or an older one is sent as an excerpt with music on both sides of the window, then spliced back. A 10-minute piece works, as long as the part you rewrite is 2 minutes or less.

We tried it: the pre-chorus of a Mandarin ballad

We ran Fix a section on 「晚风慢一点」 ("Evening Wind, Slow Down"), a 3:37 Mandarin ballad from our own library: soft piano, nylon-string guitar, gentle strings and a warm female vocal. We picked the pre-chorus, 1:06 to 1:22, and typed the note in Chinese: 「加入弦乐，逐渐推高情绪，速度不变」, which means bring in strings, build the emotion, keep the tempo. The two clips near the top of this page both start at 0:58, so you hear the way in, the new part and the way out.