Sort of on-topic, but I've coined the phrase "pseudosounds" for areas of tracks that actually create sounds that weren't really intended to be heard in the way they are heard. Now I hunt for them all the time. For example, even in my own work that I have produced, I have generated a mix-down of a track that has a split second where you can hear a bell ringing as clear as day, but taking apart all of the stems gives you no such thing. It's the combination of specific sounds in the stems that generate this effect, although it is not intended. ;)