You can catalogue sheet music in the library system which can then be borrowed as and when needed by individual borrowers, they could also be added to a project box and loaned to the music department in bulk.
From the New Resource screen click on the 'Sheet Music' icon.
Add the barcode and the ISBN if it has one and click 'Continue'.
Once the resource record card appears, click in each field and add information as required. Some of the boxes will allow you to select from a list of previously entered information, the rest are free type fields.
Click 'Save' to add this resource to the system.