That actually hurts a little. I hope you reconsider, music is an art, and allowing a computer to regurgitate previous works over and over and be ok with it is awful.
Art is to be experienced and enjoyed, not just take whatever trash is thrown at you and be ok with it.
#1 is the fastest way to send because it keeps the buffers full in a consistent stream which allows tcp windows to grow as large as possible. 2 and 3 ( scp and rsync ) do round trip acks to the remote side which drastically slows things down, even if done in parallel.