>> they dig deep for their material here. it means something. they're telling you something about themselves. what is the word, duende? what is duende? i've heard it. what -- [ speaking foreign language ] >> is it an emotional state or a technical -- [ speaking foreign language ] >> is unhappiness necessary for great art? [ speaking foreign language ] >> i didn't even have to think about that. [ speaking foreign language ] >> and then you perform very well after a couple of days.