31. In just intonation , however, three 5 : 4 major thirds are less than an octave. 32. Western common practice music usually cannot be played in just intonation but requires a systematically tempered scale. 33. For example, in just intonation the major third is represented by the frequency ratio 5 : 4. 34. For instance, the above-mentioned Pythagorean perfect fifth and fourth are also used in just intonation . 35. The tone sequence is based on just intonation ; a good player can produce a wide tonal range. 36. Many commercial synthesizers provide the ability to use built-in just intonation scales or to program your own. 37. Today, however, the notes of the chanter are usually tuned in just intonation to the Mixolydian scale. 38. Interval cycles assume the use of equal temperament and may not work in other systems such as just intonation . 39. At the same time, syntonic-diatonic just intonation was posited by Zarlino as the normal tuning for singers. 40. Alternatively, we can represent just intonation pitch classes by reducing to the octave, 1 d " < 2.
