21. In the 1970s, Atlantic Records started producing a series of albums later designated on a label known as Syntonic Research. 22. Based on Pythagorean tuning, subscript numbers are then added to indicate the number of syntonic commas to lower a note by. 23. Later psychoanalytic writers emphasised how direct expression of the repressed was ego-dystonic, and indirect expression more ego-syntonic . 24. The ditone differs from the just major third ( 5 / 4 ) by the syntonic comma ( 81 / 80 ). 25. The interval 81 : 80, called the syntonic comma or comma of Didymus, is the key comma of meantone temperament. 26. Seven of these compositions in just intonation are included on his 1998 solo CD " Uncommon Practice " on Syntonic Records. 27. We obtain commas of four different sizes : the diaschisma, the lesser diesis, the syntonic comma, and the greater diesis. 28. Optometrist Joseph Shapiro of Manhattan's Unlimited Vision employs Syntonic therapy, a method developed in the 1930s by Dr . Riley Spitler. 29. The smaller chromatic and diatonic semitones differ from the larger by the syntonic comma ( 81 : 80 or 21.5 cents ). 30. The composition of the septimal comma and the syntonic comma is 36 / 35, known as the " septimal diesis ".
