When improvising at a keyboard which is the best program to convert that music into a MIDI format that works on an Apple system. I will also need to manipulate that data, because I will make mistakes during the improv. I have used Encore for years. But dues to recent changes(from analog to digital) I have experienced many problems. I use a Yamaha silent series piano for input and a Roland SC-88 for output. I think I need a program that records the music but allows me to change the sounds not only the musical notation.