Bulk upload files
Using Jamroom
You do not do it individually. It sounds like your download button has been hidden - just view the audio list as master admin for one of your profiles, and click on the "configure these buttons and the order they appear in" button that is on the far right (might be hilighted yellow) - click on that and then make sure the download button is enabled. You can do the same thing in the item details page.
Hope this helps!