[Baroninkjet]

I am working on a rather unusual project for a non-profit group I am involved with, and thought someone might have a suggestion for a rather oddball question. The group has a series of private audio recordings it would like to make available to its members, but ideally allowing them to listen only and not download the MP3 files.
 
OneDrive and related services work just fine for the streaming part, but I have yet to figure out a way to preventing downloading. 
 
Has anyone ever heard or a cloud service that would allow streaming but not downloading?
 
Thanks a bunch! I appreciate you tolerating a somewhat off-topic question.