You're composing and performing at the same time, and with a vast array of controls.
M's powerful tools and musical controls let you work so quickly and interactively that the line between composing and performing becomes blurred. You enter your basic musical ideas and materials as melodies, chords, and rhythms, and then work with M to transform those ideas into finished compositions. Instead of merely playing back what you've already composed, M becomes a part of the actual process of composition. Composing music with M is radically different from writing music on paper or recording into a tape recorder or MIDI sequencer.