Semitone (interval region): Difference between revisions
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The concept started as an interval in the chromatic scale, and is still used this way. The interval region is a later association. You can't just make it the main definition Tag: Undo |
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{{Wikipedia|Semitone}} | {{Wikipedia|Semitone}} | ||
A '''semitone''' | A '''semitone''' is an interval that makes up part of a [[tone]], often as one step of a 12-tone chromatic scale. In [[just intonation]], an interval may be classified as a semitone if it is reasonably mapped to [[24edo|2\24]]. The use of 24edo's 2\24 as the mapping criteria here rather than [[12edo]]'s 1\12 better captures the characteristics of many intervals in the [[11-limit|11-]] and [[13-limit]]. Semitones come in two functional categories based on their number of steps in the [[5L 2s|diatonic]] scale: | ||
* [[Diatonic semitone]]s, minor seconds (m2), or limmas, | |||
* [[Chromatic semitone]]s, augmented unisons (A1), or chromas. | |||
As a concrete [[interval region]], it is typically near 100{{cent}} in size, distinct from [[commas and dieses]] (less than 60{{c}}), and from [[neutral second]]s (about 150{{c}}). A rough tuning range for the semitone is about 60{{c}} to 125{{c}} according to [[Margo Schulter]]'s theory of interval regions. | |||
The intervals covered in this article range from 50{{c}} to 140{{c}}. | The intervals covered in this article range from 50{{c}} to 140{{c}}. | ||
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== In | == In edos == | ||
The following table lists the best tuning of 16/15, 25/24, and other semitones if present, in various significant [[edo | The following table lists the best tuning of 16/15, 25/24, and other semitones if present, in various significant [[edo]]s. | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
! | ! Edo | ||
! 16/15 | ! 16/15 | ||
! 25/24 | ! 25/24 | ||