I am new to this. While putting together a new project, I am using apple loops bread & butter 21, 24 & 37. They were not in the same key so I changed the notes in Score. It's now the correct key and follows the progression but during playback sounds like its flat or just a little off. how can I correct this? Also how do you change key on a single track or on the whole project if you have too. Finally, can you label areas such as intro, verse, chorus like garage band? Thanks.