Yes sorry, I only found that explanation yesterday whilst searching for Garage Band explanations, and thought it a good one to share.
I’m using the Crescendo music notation program, but for sharing I convert the sheet music printout to a PDF document, then everyone can view and print it.
Problem! – That Drop-Box site wants me to register just to view the documents and that’s not going to happen.
One thing I don’t like about Sound-Cloud. When you open a page with these SC files on it – it downloads the files first whether you want to listen to them or not, and the page can take a while to download completely. I prefer to have a choice when playing downloads, which can be large.