CourseHow to derive IntervallsCourse overview ▾3Quality of the Interval 1 …Determine where the 'natural' semitones are.The natural semitones are between e-f and b-c. In the image below they are marked in a c-major scale. Back Next4 Quality of the interval 2 This content is licensed under CC BY-SA 4.0serlo.orgCC BY-SA 4.0 → Info