Tonight while driving home from dinner, I discovered that my favorite jazz CD was out of tune. The trombone and sax players were not at the same pitch center. How could this be? Was it my stereo? No, it was my ears! With sinus stuffiness, my right and left ear interpreted the music at different pitches. Turning the stereo off, and singing high-pitches, I heard "two" people, many cents apart in pitch. This has never happened to me before and I hope it goes away soon.