If the PTBNL is Ben Ford, or if the DBacks plan on signing Womack long-term, then this is definitely a bad trade. As I see it now, I'd say there's a 90% chance the DBacks get the better end (by a tiny tiny margin) and a 10% chance the Pirates get the better end (possibly by a huge margin).

He asked Jamie to run to the closest store and buy peanut butter, jelly, bread, milk, and animal crackers.

[…]But, as with the furball that had broken out around San Francisco, things escalated once again, as Teruzuki rolled better on her perception check, ambushing Sterett and blowing enough holes in her to force the U.S. destroyer to withdraw.

In 1839, German experimenter Heinrich Wilhelm Dove discovered that illusory beats are perceived when pure tones of slightly different frequency are separately and simultaneously presented to each ear. Dove's insight was to realize that since there is no acoustic mixing of the tones, the perceived beats must exist solely within the auditory system, specifically that part which processes binaural (e.g., stereo) sound.