I am curious about the production on the singer's voice in this live performance and this live performance (the effect is similar). I'm sure you are all familiar with the vocal sounds of Is This It and Room on Fire. The vocal sounds in these live performances seem to be different--perhaps more sawtoothy or robotic or something. I do not have the understanding of production to know how this sound was created nor the vocabulary to fully describe what I am hearing! I hope someone with more knowledge of vocal production techniques can help de-mystify this sound for me.