The voice of CG pop idol Hatsune Miku simply soars! Perhaps you've heard it? Singing voices synthesized by computers are storming on to the stage. One recording with synthesized singing even reached number one on the Japanese charts! And all of this is underpinned by the amazing progress of voice synthesizing technology, just in the past few years. The voices are made by computer, but they sound natural and full of feeling! There is even technology that can synthesize just about anybody's voice, even yours! What are the secrets behind these amazing advances? What is the essence of expression? What does singing mean to people? We ask these essential questions from the front line of voice synthesizing technology.