Eleventh

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Notion

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Science and technology

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What Wikipedia says

In music theory, an eleventh is a compound interval consisting of an octave plus a fourth. A perfect eleventh spans 17 and the augmented eleventh 18 semitones, or 10 steps in a diatonic scale. For instance, the interval between C4 and F5 (in scientific pitch notation) is a perfect eleventh.

Excerpt from the Wikipedia article “Eleventh (interval)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Created by Hyacinth (talk) 04:43, 8 January 2011 using Sibelius 5., Public domain, via Wikimedia Commons.