1/1: Difference between revisions

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~~<h2>IMPORTED REVISION FROM WIKISPACES</h2>~~

{{Infobox Interval

~~This is an imported revision from Wikispaces.~~ The ~~revision metadata~~ is ~~included below for reference:<br>~~

| Name = (perfect) unison, (perfect) prime, 1st harmonic, 1st subharmonic, fundamental

~~: This revision was by author~~ [[~~User:spt3125|spt3125~~]] ~~and made on <tt>2014-06-09 21:49:16 UTC</tt>.<br>~~

| Color name = w1, wa unison

~~: The original revision id was <tt>513413924</tt>.<br>~~

}}

~~: The revision comment was: <tt></tt><br>~~

The '''unison''' (interval ratio '''1/1''') is the [[interval]] between two tones that are identical in pitch. In the [[harmonic series]], 1/1 is the 1st [[harmonic]], and likewise in the [[subharmonic series]] 1/1 is the first [[subharmonic]] – this is because it acts as the fundamental to both series.

~~The revision contents~~ are ~~below, presented both in the original Wikispaces Wikitext format, and~~ in ~~HTML exactly as Wikispaces rendered it~~.~~<br>~~

~~<h4>Original Wikitext content:</h4>~~

Measured in [[cent]]s (or any other logarithmic measure such as [[2/1|octave]]s, [[edo|edosteps]], etc.), the unison's size is exactly 0. This is because the distance between two identical pitches is zero. As such, the unison can be considered as a degenerate interval.

<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;white-space: pre-wrap ! important" class="old-revision-html">In [[~~Just Intonation~~]], 1/1 ~~(also called~~ the /~~/unison// or //perfect prime//) represents~~ the ~~base frequency from which an interval~~ is ~~measured. As a frequency ratio,~~ it ~~is simply 1~~. Measured in [[cent]]s (or any other logarithmic measure such as ~~millioctaves~~, ~~EDO steps~~, etc.) it is exactly zero.~~</pre></div>~~

~~<h4>Original HTML content:</h4>~~

In [[just intonation]], 1/1 represents the base frequency from which an interval is measured.

<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;width:200%;white-space: pre-wrap ! important" class="old-revision-html"><html><head><title>1_1</title></head><body>In ~~<a class="wiki_link" href="/Just%20Intonation">Just Intonation</a>~~, 1/1 ~~(also called the <em>unison</em> or <em>perfect prime</em>)~~ represents the base frequency from which an interval is measured. As ~~a frequency ratio, it is simply~~ 1~~. Measured in~~ <a ~~class=~~"~~wiki_link~~" ~~href=~~"~~/cent~~"~~>cent</a>s~~ (or ~~any other logarithmic measure such~~ as ~~millioctaves~~, ~~EDO steps~~, ~~etc~~.) it is ~~exactly zero~~.~~</body></html>~~<~~/pre></div~~>

== As an interval region ==

{{Infobox interval region

| Name = Unison

| Cents lower = 0

| Cents upper = 0

| Cents upper wide = 6

| JI intervals = 1/1

| Complement = [[Octave]]

| Lower region =

| Higher region = [[Comma and diesis]]

}}

As an interval region, the unison usually refers precisely to the 0-cent interval. However, there can be a tiny difference between any two intervals that are practically "the same note" (more pedantically, an extremely small [[Unnoticeable comma|comma]]), that might be considered a "unison" (or at least too small to be a meaningful interval). This range usually goes up to 3.5 cents, as that is the just-noticeable difference.

In some practices, this bound goes up to about 6 cents, which is the most precisely one is expected to intonate a pitch on certain instruments, and is a bit smaller than a [[Kleisma (interval region)|kleisma]] (hence the kleisma's significance in the context of intonation).

As a diatonic interval category, unisons represent [[subchromatic]] motions – i.e. the difference between a note and itself (though perhaps in a different tuning or using a non-diatonic accidental, though that's more generally covered by [[comma and diesis]]). Every note in every scale has a unison, which is that note itself.

In functional harmony, the unison over the root serves as the [[tonic]].

== See also ==

* [[Fundamental]]

* [[Octave reduction]]

[[Category:Unison| ]]

[[Category:1-odd-limit]]

@@ Line 1: / Line 1: @@
-<h2>IMPORTED REVISION FROM WIKISPACES</h2>
+{{Infobox Interval
-This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
+| Name = (perfect) unison, (perfect) prime, 1st harmonic, 1st subharmonic, fundamental
-: This revision was by author [[User:spt3125|spt3125]] and made on <tt>2014-06-09 21:49:16 UTC</tt>.<br>
+| Color name = w1, wa unison
-: The original revision id was <tt>513413924</tt>.<br>
+}}
-: The revision comment was: <tt></tt><br>
+The '''unison''' (interval ratio '''1/1''') is the [[interval]] between two tones that are identical in pitch. In the [[harmonic series]], 1/1 is the 1st [[harmonic]], and likewise in the [[subharmonic series]] 1/1 is the first [[subharmonic]] – this is because it acts as the fundamental to both series.
-The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br>
-<h4>Original Wikitext content:</h4>
+Measured in [[cent]]s (or any other logarithmic measure such as [[2/1|octave]]s, [[edo|edosteps]], etc.), the unison's size is exactly 0. This is because the distance between two identical pitches is zero. As such, the unison can be considered as a degenerate interval.
-<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;white-space: pre-wrap ! important" class="old-revision-html">In [[Just Intonation]], 1/1 (also called the //unison// or //perfect prime//) represents the base frequency from which an interval is measured. As a frequency ratio, it is simply 1. Measured in [[cent]]s (or any other logarithmic measure such as millioctaves, EDO steps, etc.) it is exactly zero.</pre></div>
-<h4>Original HTML content:</h4>
+In [[just intonation]], 1/1 represents the base frequency from which an interval is measured.
-<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;width:200%;white-space: pre-wrap ! important" class="old-revision-html">&lt;html&gt;&lt;head&gt;&lt;title&gt;1_1&lt;/title&gt;&lt;/head&gt;&lt;body&gt;In &lt;a class="wiki_link" href="/Just%20Intonation"&gt;Just Intonation&lt;/a&gt;, 1/1 (also called the &lt;em&gt;unison&lt;/em&gt; or &lt;em&gt;perfect prime&lt;/em&gt;) represents the base frequency from which an interval is measured. As a frequency ratio, it is simply 1. Measured in &lt;a class="wiki_link" href="/cent"&gt;cent&lt;/a&gt;s (or any other logarithmic measure such as millioctaves, EDO steps, etc.) it is exactly zero.&lt;/body&gt;&lt;/html&gt;</pre></div>
+== As an interval region ==
+{{Todo|complete section}}
+{{Infobox interval region
+| Name = Unison
+| Cents lower = 0
+| Cents upper = 0
+| Cents upper wide = 6
+| JI intervals = 1/1
+| Complement = [[Octave]]
+| Lower region =
+| Higher region = [[Comma&nbsp;and&nbsp;diesis]]
+}}
+{{Wikipedia|Unison}}
+As an interval region, the unison usually refers precisely to the 0-cent interval. However, there can be a tiny difference between any two intervals that are practically "the same note" (more pedantically, an extremely small [[Unnoticeable comma|comma]]), that might be considered a "unison" (or at least too small to be a meaningful interval). This range usually goes up to 3.5 cents, as that is the just-noticeable difference.
+In some practices, this bound goes up to about 6 cents, which is the most precisely one is expected to intonate a pitch on certain instruments, and is a bit smaller than a [[Kleisma (interval region)|kleisma]] (hence the kleisma's significance in the context of intonation).
+As a diatonic interval category, unisons represent [[subchromatic]] motions – i.e. the difference between a note and itself (though perhaps in a different tuning or using a non-diatonic accidental, though that's more generally covered by [[comma and diesis]]). Every note in every scale has a unison, which is that note itself.
+In functional harmony, the unison over the root serves as the [[tonic]].
+== See also ==
+* [[Fundamental]]
+* [[Octave reduction]]
+[[Category:Unison| ]]<!-- main article -->
+[[Category:1-odd-limit]]