just intonation

Noun

 * 1)  The correct sounding of notes or intervals; true pitch.
 * 2)  The giving all chords and intervals in their purity or their exact mathematical ratio, or without temperament; a process in which the number of notes and intervals required in the various keys is much greater than the twelve to the octave used in systems of temperament.

Translations

 * Chinese:
 * Spanish: temperamento justo