That's right - it was on the RadioLab podcast. I thought he was "listening" to music during the operation, and told the doctors to stop if his interpretation of the melody turned to white noise. The unsettling gist of the main story was the relationship between culpability and brain function. Worth a listen.

ah yes, that's it radiolab! good pull. I may have gotten a few of the musical details off, sorry!

As for the main topic of the story of how brain affects culpability is an extremely interesting/debatable point. However, the even stronger point being made by one of the guests that free will itself is just a biological function was hard for me to swallow.

As jjw1414 says, unsettling would be a mild description of some of the implications being made by the researcher on the piece.