Sometimes, software upgrades expand what you can do, as when MIDI sequencing apps first added audio recording and editing. Others fundamentally change how you perform those tasks. Since its inception, Ableton Live has done this, letting you improvise and rearrange music as you play, using the program like an instrument in addition to a big multitrack recorder, and molding loops into real musical building material. Not to mention its interface, designed so you create from one screen instead of lots of windows. Can Live 6 keep changing how you work while serving the needs of an increasingly broad audience?