13edo: Difference between revisions
Wikispaces>TallKite **Imported revision 602809706 - Original comment: ** |
Wikispaces>TallKite **Imported revision 602810166 - Original comment: ** |
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<h2>IMPORTED REVISION FROM WIKISPACES</h2> | <h2>IMPORTED REVISION FROM WIKISPACES</h2> | ||
This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br> | This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br> | ||
: This revision was by author [[User:TallKite|TallKite]] and made on <tt>2016-12-25 | : This revision was by author [[User:TallKite|TallKite]] and made on <tt>2016-12-25 23:16:42 UTC</tt>.<br> | ||
: The original revision id was <tt> | : The original revision id was <tt>602810166</tt>.<br> | ||
: The revision comment was: <tt></tt><br> | : The revision comment was: <tt></tt><br> | ||
The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br> | The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br> | ||
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*based on treating 13-EDO as a 2.5.9.11.13.21 subgroup temperament; other approaches are possible. | *based on treating 13-EDO as a 2.5.9.11.13.21 subgroup temperament; other approaches are possible. | ||
13edo can also be notated with ups and downs. The notational 5th is the 2nd-best approximation of 3/2, 7\13. | 13edo can also be notated with ups and downs. The notational 5th is the 2nd-best approximation of 3/2, 7\13. This is 56¢ flat of 3/2, and the best approximation is 36¢ sharp, noticeably better. But using the 2nd-best 5th allows conventional notation to be used, including the staff, note names, relative notation, etc. There are two ways to do this. The first way preserves the __melodic__ meaning of sharp/flat, major/minor and aug/dim, in that sharp is higher pitched than flat, and major/aug is wider than minor/dim. The disadvantage to this approach is that conventional interval arithmetic no longer works. e.g. M2 + M2 isn't M3, and D + M2 isn't E. Chord names are different because C - E - G isn't P1 - M3 - P5. | ||
The second approach preserves the __harmonic__ meaning of sharp/flat, major/minor and aug/dim, in that the former is always further fifthwards on the chain of fifths than the latter. Sharp is lower in pitch than flat, and major/aug is narrower than minor/dim. While this approach may seem bizarre at first, interval arithmetic and chord names work as usual. Furthermore, conventional 12edo music can be directly translated to 13edo "on the fly". | The second approach preserves the __harmonic__ meaning of sharp/flat, major/minor and aug/dim, in that the former is always further fifthwards on the chain of fifths than the latter. Sharp is lower in pitch than flat, and major/aug is narrower than minor/dim. While this approach may seem bizarre at first, interval arithmetic and chord names work as usual. Furthermore, conventional 12edo music can be directly translated to 13edo "on the fly". | ||
||= **Degree** ||= **Cents** ||||||= [[xenharmonic/Ups and Downs Notation|Up/down notation]] with | ||= **Degree** ||= **Cents** ||||||= [[xenharmonic/Ups and Downs Notation|Up/down notation]] using the narrow 5th of 7\13, | ||
major wider than minor ||||||= Up/down notation with | with major wider than minor ||||||= Up/down notation using the narrow 5th of 7\13, | ||
major narrower than minor || | with major narrower than minor || | ||
||= 0 ||= 0 ||= perfect unison ||= P1 ||= D ||= perfect unison ||= P1 ||= D || | ||= 0 ||= 0 ||= perfect unison ||= P1 ||= D ||= perfect unison ||= P1 ||= D || | ||
||= 1 ||= 92 ||= up unison, minor 2nd ||= ^1, m2 ||= D^, E ||= up unison, major 2nd ||= ^1, M2 ||= D^, E || | ||= 1 ||= 92 ||= up unison, minor 2nd ||= ^1, m2 ||= D^, E ||= up unison, major 2nd ||= ^1, M2 ||= D^, E || | ||
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*based on treating 13-EDO as a 2.5.9.11.13.21 subgroup temperament; other approaches are possible.<br /> | *based on treating 13-EDO as a 2.5.9.11.13.21 subgroup temperament; other approaches are possible.<br /> | ||
<br /> | <br /> | ||
13edo can also be notated with ups and downs. The notational 5th is the 2nd-best approximation of 3/2, 7\13. | 13edo can also be notated with ups and downs. The notational 5th is the 2nd-best approximation of 3/2, 7\13. This is 56¢ flat of 3/2, and the best approximation is 36¢ sharp, noticeably better. But using the 2nd-best 5th allows conventional notation to be used, including the staff, note names, relative notation, etc. There are two ways to do this. The first way preserves the <u>melodic</u> meaning of sharp/flat, major/minor and aug/dim, in that sharp is higher pitched than flat, and major/aug is wider than minor/dim. The disadvantage to this approach is that conventional interval arithmetic no longer works. e.g. M2 + M2 isn't M3, and D + M2 isn't E. Chord names are different because C - E - G isn't P1 - M3 - P5.<br /> | ||
<br /> | <br /> | ||
The second approach preserves the <u>harmonic</u> meaning of sharp/flat, major/minor and aug/dim, in that the former is always further fifthwards on the chain of fifths than the latter. Sharp is lower in pitch than flat, and major/aug is narrower than minor/dim. While this approach may seem bizarre at first, interval arithmetic and chord names work as usual. Furthermore, conventional 12edo music can be directly translated to 13edo &quot;on the fly&quot;.<br /> | The second approach preserves the <u>harmonic</u> meaning of sharp/flat, major/minor and aug/dim, in that the former is always further fifthwards on the chain of fifths than the latter. Sharp is lower in pitch than flat, and major/aug is narrower than minor/dim. While this approach may seem bizarre at first, interval arithmetic and chord names work as usual. Furthermore, conventional 12edo music can be directly translated to 13edo &quot;on the fly&quot;.<br /> | ||
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<td style="text-align: center;"><strong>Cents</strong><br /> | <td style="text-align: center;"><strong>Cents</strong><br /> | ||
</td> | </td> | ||
<td colspan="3" style="text-align: center;"><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Ups%20and%20Downs%20Notation">Up/down notation</a> | <td colspan="3" style="text-align: center;"><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Ups%20and%20Downs%20Notation">Up/down notation</a> using the narrow 5th of 7\13,<br /> | ||
major wider than minor<br /> | with major wider than minor<br /> | ||
</td> | </td> | ||
<td colspan="3" style="text-align: center;">Up/down notation | <td colspan="3" style="text-align: center;">Up/down notation using the narrow 5th of 7\13,<br /> | ||
major narrower than minor<br /> | with major narrower than minor<br /> | ||
</td> | </td> | ||
</tr> | </tr> | ||