The arrangement of these 60 Qaathi scales (employed by most schools and masters in Qarth) is daunting at first but rather simple in reality. At the top there is a tuning reference for each note in the lower, middle, and upper trichords. The upper fraction represents the tuning of the note in reference to the root of the trichord, while the lower fraction represents the tuning in reference to the root of the scale (the root of the lower trichord).
There are two groups of 30 scales each: one group where the scale begins with a combination of “Major / Minor” trichords, and one beginning the scale with a combination of “Minor / Major” trichords. These combinations of lower and middle trichords are displayed on the leftmost column, and they will combine with the topmost row of the diagram, where the upper trichord of the scale needs to be chosen to finish the scale. To name the combinations of lower and middle trichords I have used the same type of numerical system employed in the Dornish scale system. This is for the sake of simplicity, as the Qaathi system gives a distinct name to every possible trichord and scales, and such level of detail wouldn’t be of any help in this compendium.