Sorry for the basic question, but I couldn't find information on this.
I am looking to to analyze my own songs and then experiment with them using echonest-remix. But it gave me pause when I realized I needed to upload them. What does it mean to upload the mp3s? Are the mp3s saved somewhere on other servers and is it possible for other people to then access or download them? Up until now, the mp3s have been only on my private hard drives. Anything I should be concerned about if I'm trying to keep my songs private until I sell them on cd?