How to import a file from Sibelius?
To import your sheet music from any version of Sibelius on Flat, we advise you to use MusicXML. MusicXML is the standard exchange format for sheet music and includes all your notation details.
Convert/Export your Sibelius file to MusicXML
If you are using Sibelius 7 or above, you can directly use the built-in MusicXML export. Go to File → Export → MusicXML and choose Compressed (*.mxl).
If your version of Sibelius is 6 or lower, or want a better export, you can download and use the Dolet plugin.
Import your Finale MusicXML file on Flat
On Flat, go to My Library, then drag & drop your XML/MXL file. You can also click on the Import a score or tab button, or New score or tab and choose Import your creation:
Choose your file(s) to import, and they will be directly added to your Flat account.
You can also export your scores back in MusicXML from Flat and open them with Sibelius.