Trace a Pitch Class Cycle by Semitone Interval

Tone Cycle Atlas repeats a chosen interval of 1 to 11 semitones from a starting note and stops when it returns to the start. The diagram and ordered list show pitch classes, so octave and register are intentionally ignored. A four-semitone step makes a major-third cycle; spelling is a display choice, and a flat or sharp name can refer to the same sounding pitch class in equal temperament.

How to use Tone Cycle Atlas

1. Choose a starting note, enter a whole-number step from 1 to 11 semitones, and select flat or sharp names.
2. Select Draw cycle to see each distinct stop and the final return to the starting note.
3. Read the ordered sequence beside the diagram, then download the text practice list or reset the controls.