Dan and Brian talk to music theorist Don Traut about how sounds become anchors, or reference points for musical experiences. Tim Lohman describes how certain harmonies penetrate his being. Bruce Blackstone speaks of his realization that many of his favorite rock songs were based on the blues. David Harrington tells of the time that he realized when he had to be in a string quartet because of hearing a particular chord. The musical memories inspire a wide-ranging discussion about why people savor resolutions and lush orchestrations, how predictable musical patterns can be soothing, and whether or not an Eflat chord is the center of the musical universe.