If, for example, on the same tape events between A and B are exactly the same as between F and G regarding timing, amplitude, dialogue, same frequencies, etc. The probability of a naturally occurring exact duplication of sequential acoustic events is infinitesimal. Analysis of the sequence of events reveals an exact duplication of events. This recording was intentionally falsified. Example from an actual case.
Dialogue decoding is the process of determining from a recording what has been said.
A skilled individual can use this as an aid in making judgments regarding content of words and phrases. All of these components aid in the process of decoding. Strictly speaking, dialogue decoding is not within the realm of the forensic audio engineer. However, during the activity of intelligibility enhancement opinions are formed and an experienced engineer's observations may be very astute, since no one has evaluated the recording more repetitively or critically than the engineer. An individual who may be considered an expert in dialogue decoding is a speech scientist.