I understand that this is an ad for airsequel, but as a musician and programmer I have no idea what this is. What kind of sheet music does it accept? Do I need to manually enter in all the fields?
It's supposed to be used to manage your own collection of sheet music, so yes, you have to upload everything yourself. It supports most image formats (JPEG, PNG, …), SVGs, and PDFs. I recommend using SVGs because it has the best quality to file-size ratio and unlike for PDF all pages can be loaded in parallel.
