Cloud Library
The Cloud Library in The Ultimate Piano stores MIDI files, audio, MusicXML and PDF scores and lead sheets online. Sort them into folders of your own and open the same file on any computer you sign in on — annotations and page timings included. For MusicXML scores there is also a public collection of sheet music you can search and play.
The same two windows — one to open a file, one to save it — appear in every player and editor, so your whole practice library lives in one place instead of scattered across downloads folders on different computers.
On this page

How to Open the Cloud Library
Each player has a File menu with Open… (load a file) and Upload (save the loaded file to your cloud), plus Close file:
- In the MIDI Player and Audio Player
- In the Sheet Music Player for MusicXML scores and the PDF Score Reader for PDF scores
In the Leadsheet Editor the same windows open from Load and Save.
Open… shows two columns: From device on the left — choose a file or drag it in — and your cloud on the right. The cloud column has the tab My Cloud for your own files; in the Sheet Music Player a second tab, Public Cloud, browses the public collection.
Save Music Online
Click Upload (or Save in the Leadsheet Editor). The window shows the form on the left and your folders on the right:
- What you save — the file that is loaded in the player, or, with Choose another file…, any file from your computer.
- Name in your library comes from the file name, so you don't have to type it.
- Song info — pick a Genre from the list or type your own, and set a Grade from 1 to 8. For MusicXML scores the grade is suggested automatically and marked "auto-detected".
- More details — Key (picked on the Circle of Fifths), Tempo, Time signature, Composer, Arranger and Lyricist. Whatever the file carries — tempo, time signature, key, composer — is filled in for you.
- Title printed on the sheet (MusicXML only) — the name above is only for your library; fill this in to change the title written on the score as well.
Anything the app fills in automatically, you can still change — and it never overwrites something you typed yourself.
Where it goes: click a folder on the right. A banner says what Save to Cloud will do: New file: with the name, or — when you click one of the files already in that folder — Overwrites: that file, keeping its place and link. Click the file again to save as a new one instead. Where the editor can write files, Download file saves a copy to your computer too.
A file that's too large or in the wrong format is rejected before anything uploads, with a clear message — so you never wait on an upload that the server would refuse. Without an internet connection you get a plain "No internet connection" message.
Each account has 1 GB of cloud storage. Individual files can be up to 10 MB (MIDI, lead sheets) or 50 MB (audio, PDF, MusicXML).
Organize With Folders
Everything lives under a reserved top-level folder called Home — your anchor, always there, and it can't be renamed or deleted by accident. Under it you can build whatever structure fits how you practice:
- Create folders — right-click a folder in the tree (or use the menu button that appears when you point at it) and choose New subfolder. Nest them as deep as you like (e.g.
Exercises/Czerny). - Move a piece — drag it onto a folder in the tree, or click 📁→ on the item and type or pick the destination; a folder name that doesn't exist yet is created.
- Rename a folder — right-click and Rename folder. Every piece inside moves with it; nothing gets lost.
- Delete a folder — right-click and Delete folder. An empty folder simply disappears. If the folder still holds files, the app tells you how many and asks first: deleting it permanently removes those files and its subfolders — this cannot be undone.
Set up a folder per student, a setlist folder for Saturday's gig, or a folder for each composer you're working through.
Find Any Piece in Your Music Library
Click a folder to see the files in it. Every item shows its name, the composer and arranger, its folder, and its grade and genre — so you can pick the right piece before you open it, even when you have dozens stored. Hover over a long name to read it in full.
Each of your items has its own buttons:
| Button | What it does |
|---|---|
| Open | Loads the file into the player or editor |
| ✏️ | Renames the item in your library |
| 📁→ | Moves it to another folder |
| ⤓ | Downloads the file to your computer |
| 🗑 | Deletes it, after asking |
Open It Again — Wherever You Sign In
Save an arrangement on your laptop at home, sign in on the studio computer the next morning, and open it from My Cloud — no USB stick, no email-to-self. Click Open on any item and the Library loads the file you saved straight back into the editor or player. The details you add in the form are for finding the piece and don't change the file — only Title printed on the sheet writes into the score itself.
Discover the Public Sheet Music Collection
In the Sheet Music Player, switch to Public Cloud to browse the public collection of MusicXML scores — curated pieces you can play along with right away:
- Search as you type — by title, composer, arranger, lyricist or genre — and filter by genre.
- Sort the results in 4 modes: Relevance, Top Rated, Newest, or Popular.
- Each result shows its star rating, favorites and view count so you can judge it at a glance.
- Rate a piece by clicking the stars, ♥ it to mark it as a favorite, ⤓ download it, or Open it to load it straight into the player.
Which Files Can I Store?
| Where you open the Library | File types |
|---|---|
| MIDI Player | .mid, .midi |
| Audio Player | MP3, WAV, OGG, FLAC, M4A, AAC, AIFF, MP4 |
| Sheet Music Player | MusicXML (.musicxml, .xml, .mxl) |
| PDF Score Reader | |
| Leadsheet Editor | Lead sheet files |
Each file type keeps its own library — the Audio Player alone accepts up to 8 audio formats — so your MIDI files and your PDFs never get mixed together. MuseScore's own files (.mscz, .mscx) are recognized and explained: export them from MuseScore as MusicXML first.
Related: Load and practise files in the MIDI Player, Audio Player, Sheet Music Player and PDF Score Reader. Build your own charts in the Leadsheet Editor and save them to the Library.
Frequently Asked Questions
What files can I save to the Cloud Library?
MIDI files, audio files (MP3, WAV, OGG, FLAC, M4A, AAC, AIFF, MP4), MusicXML scores, PDF scores, and lead sheets. Each file type has its own library, opened from File → Open… and Upload in the matching player, or Load and Save in the Leadsheet Editor.
Will I get back exactly the file I saved?
Yes. Opening an item loads the file you saved back into the editor or player. The details you add (key, tempo, genre, grade) are for finding and recognizing the piece — they don't change the file. Only the optional "Title printed on the sheet" for MusicXML scores is written into the score.
Can I open my files on another computer?
Yes. Your library lives in the cloud, so you save on one device and open on another — just sign in with the same account. There's no USB stick or manual transfer.
How do folders work?
Everything lives under a reserved Home folder. You create subfolders from the folder tree (right-click → New subfolder), move items by dragging them onto a folder or with the move button, and rename or delete folders. Renaming a folder carries every piece inside it along; deleting a folder that still holds files asks first and then removes those files permanently.
Is there public music I can play?
Yes. In the Sheet Music Player, the Public Cloud tab holds a curated collection of MusicXML scores. Search it as you type, sort by relevance, rating, date or popularity, rate pieces, mark favorites, and open any score straight into the player.
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