Before 2000 it was unknown that a precognitive version of absolute pitch is general in humans. This ability is subconsciously applied in speech and it can be considered as a further means of speaker identification, in addition to voice timbre.

Application of the precognitive, absolute pitch-memory increases with speech emphasis. This is neuroanatomically plausible, because the major precognitive command center for speech (in the anterior cingulate cortex) is not only linked to a pitch memory but also to centers for arousal and emotion.

The motivation dependent use of the absolute pitch-memory can be assumed as one of the evolutionary foundations of song, and thus of music in general.