The Common ToneWhere the Sacred and the Profane Share the Same Cup

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← Chapter 1.5 · interval ruler

The interval axis

Local prototype

Notation

Lower note nameLower note octave

Include compound intervals

Choose the lower note beneath the staff; it stays fixed while the upper note moves. The ↑ / ↓ buttons change one half step and play the interval. Up/Down works while either arrow is focused; Home/End reaches the endpoints.

Grand staff, treble and bass show the same notes. Click the notation to hear them again; Escape stops.

Spelling changes the written interval without changing the sound. Simple intervals have up to eight letter names; compound intervals have nine or more. Include compound intervals to explore as far as a fifteenth, including its augmented form.

The playable chapter ruler remains available for comparison.

The Common Tone

Where the Sacred and the Profane Share the Same Cup.

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