How can I copy a song from one service to another?

How can I copy a song from one service to another?

When you edit a song in any service, you're editing the song's master copy, which is used for all services. The only thing that is not stored in the master copy is the background. So once you get a song set up the way you want it, go to the new service and add it. Give it the same background you used before, and it should look exactly the same as what you had in the previous service. Note that this also means that if you change a song in one service, it's also changed in every service that uses it.