Universal key fractions (e.g. an A natural in the scale above becomes ) or, more commonly in written text, by inserting an accidental before the number (e.g. the same note becomes 5 or 4). In music theory aimed towards jazz and popular music, all triads are represented by upper case numerals, followed by a symbol to indicate if it is not a major chord (e.g. "m" for minor or "ø" for half-diminished): When representing the triads rooted in a minor key, accidentals are used to indicate the chromatic alteration from the assumed major key roots indicated by numerals that don't have accidentals:
Absolute pitch may lead to playing in a tonality that is slightly different from that of the rest of the group. Absolute pitch shows a genetic overlap with synesthesia/ideasthesia, and some individuals with music-related synesthesia also have perfect pitch. They may associate certain notes or keys with different colors, enabling them to tell what any note or key is. It is unknown how many people with perfect pitch are also synesthetes. Absolute pitch is not a prerequisite for skilled musical performance or composition. However, musicians with absolute pitch tend to perform better on musical transcription tasks (controlling for age of onset and