Turn any song into MIDI
Hansy separates a song into its instruments and writes each one as MIDI. Play it back on piano, violin or anything else, or sing new words on its melody, in RosenBridge, our studio in your browser.
Free, no signup to start. Separating, converting and singing need a free account.
A short video of the studio is on its way: watch a song come apart, turn into MIDI and switch to piano.
Watch one song come apart and come back as something new
Piano to guitar. Flute to violin. Same notes, new sound.
Hansy keeps every part's notes exactly as played and only changes the sound. Chords stay chords and melodies stay single lines, so a swap sounds like the song, not a remix of it.
A piano's chords become guitar chords: every note of every chord stays.
A single line stays a single line, so a flute solo becomes a violin solo.
The bass line keeps its rhythm and register on a new low instrument.
The sung melody, played by an instrument: an instant instrumental cover.
Change the words. Keep the tune.
Type new words over any sung phrase. Hansy sings them on the song's own melody, in the original singer's voice or in yours.
- Only the phrases you change are sung again; the rest stays as recorded.
- Your own voice from a 15 to 30 second recording, made once.
- Parodies, personal versions, new verses. English for now.
Three tools nobody else puts together, and a whole studio around them
Every instrument on its own MIDI track
Most converters return one jumbled part. Hansy separates the song first, then converts each instrument on its own.
MP3 to MIDI converter →Piano now, violin next
Switch any part and hear it right away. The notes stay.
Same tune, your words
In the original voice or yours.
Detected for you; the grid follows the song.
Your computer keyboard or a MIDI keyboard.
Mix and download what you made.
It runs in your browser and saves to your account.
Open it and play. Sign up when you use a GPU.
Importing, editing, switching instruments, mixing and exporting are free with no account. Separating songs, converting to MIDI and singing run on GPUs, so they need a free account. Everything you made before signing up comes with you.
Questions, answered
What is Hansy?
A set of music tools for remaking songs: separate a song into its instruments, turn each into MIDI, play it on other instruments, and sing new words on its melody.
What is RosenBridge?
Hansy's studio. It runs in your browser, so there's nothing to install. Every tool on this site opens in it, set up for that job.
Is it free?
Opening RosenBridge, importing, editing, switching instruments, mixing and exporting are free with no account. Separating, converting to MIDI and singing use GPU minutes, which need a free account.
What's a GPU minute?
The time a graphics card spends on your job. Separating a song takes about a minute; converting one part to MIDI about a minute.
What happens to my work when I sign up?
It comes with you. The tracks and settings you had as a guest open in a new untitled session in your account.
Which songs can I use?
Any song you can import. Whether you can share the result depends on the rights to the song; covers and parodies usually need permission to publish.
Is my voice private?
Your voice clip is saved to your account and used only to sing your own projects. You confirm it's your voice before it's saved.
Which browsers work?
Recent Chrome, Edge and Firefox on a computer. Phones can open RosenBridge, but editing is easier on a bigger screen.