Cantabile is a musical term that means "singable" or "songlike," which seems like a broad enough term to use as the name of a DAW that's designed for live performance. Come to think of it, "Live" would be a good label for that kind of program, too. Guess what: they're both taken, and Cantabile v2.0 was just released in Beta. Now's you chance to compare it to that
other performance-oriented DAW.