i've been making vinyl to cd mixes for a long time, and when i want to share them, i just burn a disc and hand it off to my friends. but, there's just got to be some way making that transfer over the web, but i'm stumped. i've created playlists in iTunes, and have exported same to Spotify, but if the file doesn't exist on the recipients' hard drive, then it won't fly. seems much harder to me than it should be. anybody have the downlow?