The main structure of RealTime is: First you can construct a Section. A Section can also be an Imported MIDI file (type 1 or 0). This would be the equivalent of a Pattern or an Arrangment (in Cubase terms). The Sections can be built into a SONG and the whole thing can be saved as a "workspace" with seperate libraries for Sections and Songs.The whole thing can also be saved as a MIDI file. It also has an "M" like recording function in that you can click and change things while the music is playing and it will record your movements as a "movie" which in reality is a MIDI file. That is where the "interactive "part comes in.