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= = 

34edo divides the octave into 34 equal steps of approximately 35.29412 [[xenharmonic/cent|cent]]s. 34edo contains two [[xenharmonic/17edo|17edo]]'s and the half-octave tritone of 600 cents. It excels as a 5-limit system, with tuning even more accurate than [[31edo]], but with a sharp fifth rather than a flat one, and supports hanson, srutal, tetracot, würschmidt and vishnu temperaments. It does less well in the 7-limit, with two mappings possible for 7/4: a flat one from the patent val, and a sharp one from the 34d val. By way of the patent val 34 supports keemun temperament, and 34d is an excellent alternative to [[22edo]] for 7-limit pajara temperament. In the 11-limit, 34de supports 11-limit pajaric, and in fact is quite close to the POTE tuning; it adds 4375/4374 to the commas of 11-limit pajaric. On the other hand, the 34d val supports pajara, vishnu and würschmidt, adding 4375/4374 to the commas of pajara. Among subgroup temperaments, the patent val supports semaphore on the 2.3.7 subgroup.

===Approximations to Just Intonation=== 
Like [[xenharmonic/17edo|17edo]], 34edo contains good approximations of just intervals involving 13 and 3 -- specifically, 13/8, 13/12, 13/9 and their inversions -- while failing to closely approximate ratios of 7 or 11.* 34edo adds ratios of 5 into the mix -- including 5/4, 6/5, 9/5, 15/8, 13/10, 15/13, and their inversions -- as well as 17 -- including 17/16, 18/17, 17/12, 17/10, 17/13, 17/15 and their inversions. Since it distinguishes between 9/8 and 10/9 (exaggerating the difference between them, the "syntonic comma" of 81/80, from 21.5 cents to 35.3 cents), it is suitable for 5-limit JI. It is not a [[xenharmonic/meantone|meantone ]]system. In layman's terms while no number of fifths (frequently ratios of ~3:2) land on major or minor thirds, an even number of major or minor thirds, technically will be the same pitch as one somewhere upon the cycle of seventeen fifths.

//Viewed in light of Western diatonic theory, the three extra steps (of 34-et compared to 31-et) in effect widen the intervals between C and D, F and G, and A and B [that is: 6 5 3 6 5 6 3], thus making a distinction between major tones, ratio 9/8 and minor tones, ratio 10/9.// ([[http://en.wikipedia.org/wiki/34_equal_temperament|Wikipedia]])

* The sharpth of ~13 cents of 11/8 can fit with the 9/8 and 13/8 which both are about 7 cents sharp. This the basis of a subtle trick: the guitarist tunes the high 'E' string flat by several cents, enough to be imperceptible in many contexts, but which makes chords/harmonies against those several intervals tuned more justly.

Likewise the 16-cent flat 27\34 approximate 7/4 can be musically useful. It is an improvement over the yet sharper "dominant seventh" found in jazz - which some listeners are accustom to. <span style="line-height: 1.5;">The ability to tolerate these errors may depend on subtle natural changes in mood. A few cents either way can bother the hell out of one, but on other days you might spend an hour not knowing of the strings are, or being able to, tuned. Nevertheless </span><span style="line-height: 1.5;">[[68edo]]</span><span style="line-height: 1.5;"> (34 x 2) preserves the structure and has these intervals 7/8 and 11/8 in more perfect form... nearly just.</span>

===34edo and phi=== 
As a Fibonacci number, 34edo contains a fraction of an octave which is close approximation to the irrational interval phi -- 21 degrees of 34edo, approximately 741.2 cents. Repeated iterations of this interval generates [[xenharmonic/MOSScales|Moment of Symmetry]] scales with near-phi relationships between the step sizes. As a 2.3.5.13 temperament, the 21\34 generator is an approximate 20/13, and the temperament tempers out 512/507 and 140625/140608. From the tempering of 512/507, two 16/13 neutral thirds are an approximate 3/2, defining an essentially tempered neutral triad with a sharp rather than a flat fifth. Yes. But, to be clear the harmonic ratio of phi is ~ 833 cents, and the equal divisions of octave approximating this interval closely are 13edo and [[36edo]].

===Rank two temperaments=== 
[[xenharmonic/List of 34edo rank two temperaments by badness|List of 34edo rank two temperaments by badness]]
||~ Periods
per octave ||~ Generator ||~ Cents ||~ Linear temperaments ||
|| 1 || 1\34 || 35.294 ||   ||
||   || 3\34 || 105.882 ||   ||
||   || 5\34 || 176.471 || [[xenharmonic/Tetracot|Tetracot]]/[[xenharmonic/Bunya|Bunya]]/[[xenharmonic/Monkey|Monkey]] ||
||   || 7\34 || 247.059 || [[xenharmonic/Immunity|Immunity]] ||
||   || 9\34 || 317.647 || [[xenharmonic/Hanson|Hanson]]/[[xenharmonic/Keemun|Keemun]] ||
||   || 11\34 || 388.235 || [[xenharmonic/Wuerschmidt|Wuerschmidt]]/[[xenharmonic/Worschmidt|Worschmidt]] ||
||   || 13\34 || 458.824 ||   ||
||   || 15\34 || 529.412 ||   ||
|| 2 || 1\34 || 35.294 ||   ||
||   || 2\34 || 70.588 || [[xenharmonic/Vishnu|Vishnu]] ||
||   || 3\34 || 105.882 || [[xenharmonic/Srutal|Srutal]]/[[xenharmonic/Pajara|Pajara]]/[[xenharmonic/Diaschismic|Diaschismic]] ||
||   || 4\34 || 141.176 || [[xenharmonic/Fifive|Fifive]] ||
||   || 5\34 || 176.471 ||   ||
||   || 6\34 || 211.765 ||   ||
||   || 7\34 || 247.059 ||   ||
||   || 8\34 || 282.353 ||   ||
|| 17 || 1\34 || 35.294 ||   ||

=Intervals:= 
|| degrees of 34edo || solfege || cents
DMS || approx. ratios of
[[tel/2.3.5.13.17|2.3.5.13.17]] [[xenharmonic/subgroup|subgroup]] || additional ratios
of the full [[xenharmonic/17-limit|17-limit]] || pseudo-traditional
notation ||
|| 0 || do || 0.0 || 1/1 ||   || C = B^^ = A## ||
|| 1 || di || 35.294
<span style="background-color: #ffffff;">10°35'18"</span> ||   || 50/49 || C ^ ||
|| 2 || rih || 70.588
<span style="background-color: #ffffff;">21°10'35"</span> || 25/24 ||   || Db = C ^^ = B# ||
|| 3 || ra || 105.882
31°<span style="background-color: #ffffff;">35'18"</span> || 17/16, 18/17, 16/15 || 15/14 || C#v = Db^ ||
|| 4 || ru || 141.176
<span style="background-color: #ffffff;">42°21'11"</span> || 13/12 || 14/13, 12/11 || C# ||
|| 5 || reh || 176.471
53°<span style="background-color: #ffffff;">58'28"</span> || 10/9 || 11/10 || C#^ = Dv ||
|| 6 || re || 211.765
<span style="background-color: #ffffff;">63°31'46"</span> || 9/8, 17/15 ||   || D ||
|| 7 || raw || 247.059
74°<span style="background-color: #ffffff;">7'4"</span> || 15/13 || 8/7 || D^ ||
|| 8 || meh || 282.353
<span style="background-color: #ffffff;">84°42'21"</span> || 20/17, 75/64 || 7/6, 13/11 || Eb ||
|| 9 || me || 317.647
95°<span style="background-color: #ffffff;">17'39"</span> || 6/5 || 17/14 || D#v ||
|| 10 || mu || 352.941
<span style="background-color: #ffffff;">105°52'56"</span> || 16/13 || 11/9 || D# ||
|| 11 || mi || 388.235
116°<span style="background-color: #ffffff;">28'14"</span> || 5/4 ||   ||   ||
|| 12 || maa || 423.529
<span style="background-color: #ffffff;">127°3'32"</span> || 51/40, 32/25 || 14/11, 9/7 || E ||
|| 13 || maw || 458.823
<span style="background-color: #ffffff;">137°38'49"</span> || 13/10, 17/13 || 22/17 || E^ = Fv ||
|| 14 || fa || 494.118
<span style="background-color: #ffffff;">148°14'7"</span> || 4/3 ||   || F ||
|| 15 || fih || 529.412
158°<span style="background-color: #ffffff;">49'15"</span> ||   || 15/11 || F^ = E#v ||
|| 16 || fu || 564.706
<span style="background-color: #ffffff;">169°24'42"</span> || 18/13 || 11/8 || Gb ||
|| 17 || fi/se || 600
180° || 17/12, 24/17 || 7/5, 10/7 || Gb^ ||
|| 18 || su || 635.294
<span style="background-color: #ffffff;">190°35'18"</span> || 13/9 || 16/11 || F# ||
|| 19 || sih || 670.588
<span style="background-color: #ffffff;">201°10'35"</span> ||   || 22/15 || F#^ ||
|| 20 || sol || 705.882
<span style="background-color: #ffffff;">211°45'53"</span> || 3/2 ||   || G ||
|| 21 || saw || 741.176
<span style="background-color: #ffffff;">222°21'11"</span> || 20/13, 26/17 || 17/11 || G^ ||
|| 22 || leh || 776.471
<span style="background-color: #ffffff;">233°58'28"</span> || 25/16, 80/51 || 14/9 || Ab ||
|| 23 || le || 811.765
<span style="background-color: #ffffff;">243°31'46"</span> || 8/5 ||   || Ab^ ||
|| 24 || lu || 847.059
<span style="background-color: #ffffff;">254°7'4"</span> || 13/8 || 18/11 || G# ||
|| 25 || la || 882.353
<span style="background-color: #ffffff;">264°42'21"</span> || 5/3 || 28/17 || Av ||
|| 26 || laa || 917.647
<span style="background-color: #ffffff;">275°17'39"</span> || 17/10 || 12/7, 22/13 || A ||
|| 27 || law || 952.941
285°<span style="background-color: #ffffff;">52'56"</span> || 26/15 || 7/4 || A^ = Bbv =G## ||
|| 28 || teh || 988.235
<span style="background-color: #ffffff;">296°28'14"</span> || 16/9, 30/17 ||   || Bb ||
|| 29 || te || 1023.529
307°<span style="background-color: #ffffff;">3'32"</span> || 9/5 || 20/11 || Bb^ ||
|| 30 || tu || 1058.823
<span style="background-color: #ffffff;">317°38'49"</span> || 24/13 || 13/7, 11/6 || A# ||
|| 31 || ti || 1094.118
328°<span style="background-color: #ffffff;">14'7"</span> || 32/17, 17/9, 15/8 || 28/15 || A#^ = Bv ||
|| 32 || taa || 1129.412
<span style="background-color: #ffffff;">338°49'15"</span> || 48/25 ||   || B ||
|| 33 || da || 1164.706
349°<span style="background-color: #ffffff;">24'42"</span> ||   || 49/25 || B^ = A##v ||

==Selected just intervals by error== 
The following table shows how [[Just-24|some prominent just intervals]] are represented in 34edo (ordered by absolute error).
|| **Interval, complement** || **Error (abs., in [[cent|cents]])** ||
||= [[15_13|15/13]], [[26_15|26/15]] ||=  0.682 ||
||= [[18_13|18/13]], [[13_9|13/9]]   ||=  1.324 ||
||= [[5_4|5/4]],     [[8_5|8/5]]     ||=  1.922 ||
||= [[6_5|6/5]],     [[5_3|5/3]]     ||=  2.006 ||
||= [[13_12|13/12]], [[24_13|24/13]] ||=  2.604 ||
||= [[4_3|4/3]],     [[3_2|3/2]]     ||=  3.927 ||
||= [[13_10|13/10]], [[20_13|20/13]] ||=  4.610 ||
||= [[11_9|11/9]],   [[18_11|18/11]] ||=  5.533 ||
||= [[16_15|16/15]], [[15_8|15/8]]   ||=  5.849 ||
||= [[10_9|10/9]],   [[9_5|9/5]]     ||=  5.933 ||
||= [[14_11|14/11]], [[11_7|11/7]]   ||=  6.021 ||
||= [[16_13|16/13]], [[13_8|13/8]]   ||=  6.531 ||
||= [[13_11|13/11]], [[22_13|22/13]] ||=  6.857 ||
||= [[15_11|15/11]], [[22_15|22/15]] ||=  7.539 ||
||= [[9_8|9/8]],     [[16_9|16/9]]   ||=  7.855 ||
||= [[12_11|12/11]], [[11_6|11/6]]   ||=  9.461 ||
||= [[11_10|11/10]], [[20_11|20/11]] ||= 11.466 ||
||= [[9_7|9/7]],     [[14_9|14/9]]   ||= 11.555 ||
||= [[14_13|14/13]], [[13_7|13/7]]   ||= 12.878 ||
||= [[11_8|11/8]],   [[16_11|16/11]] ||= 13.388 ||
||= [[15_14|15/14]], [[28_15|28/15]] ||= 13.560 ||
||= [[7_6|7/6]],     [[12_7|12/7]]   ||= 15.482 ||
||= [[8_7|8/7]],     [[7_4|7/4]]     ||= 15.885 ||
||= [[7_5|7/5]],     [[10_7|10/7]]   ||= 17.488 ||

==<span style="background-color: #ffffff;">Notations</span>== 
The chain of fifths gives you the seven naturals, and their sharps and flats. The sharp or flat of a note is (what is commonly called) a neutral second away - the double-sharp means a minor third away from the natural. This has led certain "complainers", in seeking to notate 17 edo, to create an extra character to raise something a small step of which. To render this symbol philosophically harmonious with 34 tone equal temperament, a symbol indicating an adjustment of 1/34 up or down serves the purpose by using two of it, doubled laterally or vertically as composer. This however emphasizes certain aspects of 34edo which //may not be most efficient expressions of some musical purposes.// The reader can construct his own notation to the needs of the music and performer. As an example, a system with 15 "nominals" like A, B, C ... F, instead of seven, might be waste - of paper, or space, or memory if they aren't used consecutively frequently. The system spelled out here has familiarity as an advantage and disadvantage. The spacing of the nominals and lines is the same. Dense chords of certain types would be very impossible to notate. Finally, the table uses ^ and v for "up" and "down", but these might be reserved for adjustments of 1/68th of an octave, being hollow, and filled in triangles are recommended. 

==<span style="background-color: #ffffff;">Commas</span>== 
<span style="background-color: #ffffff;">34-EDO [[xenharmonic/tempering out|tempers out]] the following [[xenharmonic/comma|comma]]s. (Note: This assumes the [[xenharmonic/val|val]] < [[tel/34 54 79 95 118 126|34 54 79 95 118 126]] |.)</span>
||~ <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">**Comma**</span></span> ||~ <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">**Monzo**</span></span> ||~ <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">**Value (Cents)**</span></span> ||~ <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">**Name 1**</span></span> ||~ <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">**Name 2**</span></span> ||~ <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">**Name 3**</span></span> ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">134217728/129140163</span></span> || | 27 -17 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">66.765</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">17-comma</span></span> ||   ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">20000/19683</span></span> || | 5 -9 4 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">27.660</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Minimal Diesis</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Tetracot Comma</span></span> ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">2048/2025</span></span> || | 11 -4 -2 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">19.553</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Diaschisma</span></span> ||   ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">393216/390625</span></span> || | 17 1 -8 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">11.445</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Würschmidt comma</span></span> ||   ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">15625/15552</span></span> || | -6 -5 6 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">8.1073</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Kleisma</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Semicomma Majeur</span></span> ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">1212717/1210381</span></span> || | 23 6 -14 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">3.338</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Vishnuzma</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Semisuper</span></span> ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">1029/1000</span></span> || | -3 1 -3 3 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">49.492</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Keega</span></span> ||   ||   ||
|| <span style="display: block; text-align: center;"><span style="color: blue; display: block; text-align: center;">[[xenharmonic/49_48|49/48]]</span>
</span> || | -4 -1 0 2 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">35.697</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Slendro Diesis</span></span> ||   ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">875/864</span></span> || | -5 -3 3 1 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">21.902</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Keema</span></span> ||   ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">126/125</span></span> || | 1 2 -3 1 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">13.795</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Starling comma</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Septimal semicomma</span></span> ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">100/99</span></span> || | 2 -2 2 0 -1> || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">17.399</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Ptolemisma</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Ptolemy's comma</span></span> ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">243/242</span></span> || | -1 5 0 0 -2 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">7.1391</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Rastma</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Neutral third comma</span></span> ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">385/384</span></span> || | -7 -1 1 1 1 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">4.5026</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Keenanisma</span></span> ||   ||   ||
|| <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">91/90</span></span> || | -1 -2 -1 1 0 1 > || <span style="display: block; text-align: right;"><span style="display: block; text-align: right;">19.120</span></span> || <span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Superleap</span></span> ||   ||   ||


==Listen== 
* [[@http://www.archive.org/details/Ascension_105|Ascension]]
* [[@https://www.youtube.com/watch?v=FXTM0HeuExk|Uncomfortable In Crowds (extended)]] by Robin Perry
==Links== 
* [[http://www.microstick.net/34guitararticle.htm|34 Equal Guitar]] by [[xenharmonic/Larry Hanson|Larry Hanson]]
* [[https://microstick.net|http://microstick.net/]] websites of Neil Haverstick
* [[https://myspace.com/microstick]]

Original HTML content:

<html><head><title>34edo</title></head><body><!-- ws:start:WikiTextHeadingRule:0:&lt;h1&gt; --><h1 id="toc0"><!-- ws:end:WikiTextHeadingRule:0 --> </h1>
 <br />
34edo divides the octave into 34 equal steps of approximately 35.29412 <a class="wiki_link" href="http://xenharmonic.wikispaces.com/cent">cent</a>s. 34edo contains two <a class="wiki_link" href="http://xenharmonic.wikispaces.com/17edo">17edo</a>'s and the half-octave tritone of 600 cents. It excels as a 5-limit system, with tuning even more accurate than <a class="wiki_link" href="/31edo">31edo</a>, but with a sharp fifth rather than a flat one, and supports hanson, srutal, tetracot, würschmidt and vishnu temperaments. It does less well in the 7-limit, with two mappings possible for 7/4: a flat one from the patent val, and a sharp one from the 34d val. By way of the patent val 34 supports keemun temperament, and 34d is an excellent alternative to <a class="wiki_link" href="/22edo">22edo</a> for 7-limit pajara temperament. In the 11-limit, 34de supports 11-limit pajaric, and in fact is quite close to the POTE tuning; it adds 4375/4374 to the commas of 11-limit pajaric. On the other hand, the 34d val supports pajara, vishnu and würschmidt, adding 4375/4374 to the commas of pajara. Among subgroup temperaments, the patent val supports semaphore on the 2.3.7 subgroup.<br />
<br />
<!-- ws:start:WikiTextHeadingRule:2:&lt;h3&gt; --><h3 id="toc1"><a name="x--Approximations to Just Intonation"></a><!-- ws:end:WikiTextHeadingRule:2 -->Approximations to Just Intonation</h3>
 Like <a class="wiki_link" href="http://xenharmonic.wikispaces.com/17edo">17edo</a>, 34edo contains good approximations of just intervals involving 13 and 3 -- specifically, 13/8, 13/12, 13/9 and their inversions -- while failing to closely approximate ratios of 7 or 11.* 34edo adds ratios of 5 into the mix -- including 5/4, 6/5, 9/5, 15/8, 13/10, 15/13, and their inversions -- as well as 17 -- including 17/16, 18/17, 17/12, 17/10, 17/13, 17/15 and their inversions. Since it distinguishes between 9/8 and 10/9 (exaggerating the difference between them, the &quot;syntonic comma&quot; of 81/80, from 21.5 cents to 35.3 cents), it is suitable for 5-limit JI. It is not a <a class="wiki_link" href="http://xenharmonic.wikispaces.com/meantone">meantone </a>system. In layman's terms while no number of fifths (frequently ratios of ~3:2) land on major or minor thirds, an even number of major or minor thirds, technically will be the same pitch as one somewhere upon the cycle of seventeen fifths.<br />
<br />
<em>Viewed in light of Western diatonic theory, the three extra steps (of 34-et compared to 31-et) in effect widen the intervals between C and D, F and G, and A and B [that is: 6 5 3 6 5 6 3], thus making a distinction between major tones, ratio 9/8 and minor tones, ratio 10/9.</em> (<a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/34_equal_temperament" rel="nofollow">Wikipedia</a>)<br />
<br />
<ul><li>The sharpth of ~13 cents of 11/8 can fit with the 9/8 and 13/8 which both are about 7 cents sharp. This the basis of a subtle trick: the guitarist tunes the high 'E' string flat by several cents, enough to be imperceptible in many contexts, but which makes chords/harmonies against those several intervals tuned more justly.</li></ul><br />
Likewise the 16-cent flat 27\34 approximate 7/4 can be musically useful. It is an improvement over the yet sharper &quot;dominant seventh&quot; found in jazz - which some listeners are accustom to. <span style="line-height: 1.5;">The ability to tolerate these errors may depend on subtle natural changes in mood. A few cents either way can bother the hell out of one, but on other days you might spend an hour not knowing of the strings are, or being able to, tuned. Nevertheless </span><span style="line-height: 1.5;"><a class="wiki_link" href="/68edo">68edo</a></span><span style="line-height: 1.5;"> (34 x 2) preserves the structure and has these intervals 7/8 and 11/8 in more perfect form... nearly just.</span><br />
<br />
<!-- ws:start:WikiTextHeadingRule:4:&lt;h3&gt; --><h3 id="toc2"><a name="x--34edo and phi"></a><!-- ws:end:WikiTextHeadingRule:4 -->34edo and phi</h3>
 As a Fibonacci number, 34edo contains a fraction of an octave which is close approximation to the irrational interval phi -- 21 degrees of 34edo, approximately 741.2 cents. Repeated iterations of this interval generates <a class="wiki_link" href="http://xenharmonic.wikispaces.com/MOSScales">Moment of Symmetry</a> scales with near-phi relationships between the step sizes. As a 2.3.5.13 temperament, the 21\34 generator is an approximate 20/13, and the temperament tempers out 512/507 and 140625/140608. From the tempering of 512/507, two 16/13 neutral thirds are an approximate 3/2, defining an essentially tempered neutral triad with a sharp rather than a flat fifth. Yes. But, to be clear the harmonic ratio of phi is ~ 833 cents, and the equal divisions of octave approximating this interval closely are 13edo and <a class="wiki_link" href="/36edo">36edo</a>.<br />
<br />
<!-- ws:start:WikiTextHeadingRule:6:&lt;h3&gt; --><h3 id="toc3"><a name="x--Rank two temperaments"></a><!-- ws:end:WikiTextHeadingRule:6 -->Rank two temperaments</h3>
 <a class="wiki_link" href="http://xenharmonic.wikispaces.com/List%20of%2034edo%20rank%20two%20temperaments%20by%20badness">List of 34edo rank two temperaments by badness</a><br />


<table class="wiki_table">
    <tr>
        <th>Periods<br />
per octave<br />
</th>
        <th>Generator<br />
</th>
        <th>Cents<br />
</th>
        <th>Linear temperaments<br />
</th>
    </tr>
    <tr>
        <td>1<br />
</td>
        <td>1\34<br />
</td>
        <td>35.294<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>3\34<br />
</td>
        <td>105.882<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>5\34<br />
</td>
        <td>176.471<br />
</td>
        <td><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Tetracot">Tetracot</a>/<a class="wiki_link" href="http://xenharmonic.wikispaces.com/Bunya">Bunya</a>/<a class="wiki_link" href="http://xenharmonic.wikispaces.com/Monkey">Monkey</a><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>7\34<br />
</td>
        <td>247.059<br />
</td>
        <td><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Immunity">Immunity</a><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>9\34<br />
</td>
        <td>317.647<br />
</td>
        <td><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Hanson">Hanson</a>/<a class="wiki_link" href="http://xenharmonic.wikispaces.com/Keemun">Keemun</a><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>11\34<br />
</td>
        <td>388.235<br />
</td>
        <td><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Wuerschmidt">Wuerschmidt</a>/<a class="wiki_link" href="http://xenharmonic.wikispaces.com/Worschmidt">Worschmidt</a><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>13\34<br />
</td>
        <td>458.824<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>15\34<br />
</td>
        <td>529.412<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td>2<br />
</td>
        <td>1\34<br />
</td>
        <td>35.294<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>2\34<br />
</td>
        <td>70.588<br />
</td>
        <td><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Vishnu">Vishnu</a><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>3\34<br />
</td>
        <td>105.882<br />
</td>
        <td><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Srutal">Srutal</a>/<a class="wiki_link" href="http://xenharmonic.wikispaces.com/Pajara">Pajara</a>/<a class="wiki_link" href="http://xenharmonic.wikispaces.com/Diaschismic">Diaschismic</a><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>4\34<br />
</td>
        <td>141.176<br />
</td>
        <td><a class="wiki_link" href="http://xenharmonic.wikispaces.com/Fifive">Fifive</a><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>5\34<br />
</td>
        <td>176.471<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>6\34<br />
</td>
        <td>211.765<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>7\34<br />
</td>
        <td>247.059<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><br />
</td>
        <td>8\34<br />
</td>
        <td>282.353<br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td>17<br />
</td>
        <td>1\34<br />
</td>
        <td>35.294<br />
</td>
        <td><br />
</td>
    </tr>
</table>

<br />
<!-- ws:start:WikiTextHeadingRule:8:&lt;h1&gt; --><h1 id="toc4"><a name="Intervals:"></a><!-- ws:end:WikiTextHeadingRule:8 -->Intervals:</h1>
 

<table class="wiki_table">
    <tr>
        <td>degrees of 34edo<br />
</td>
        <td>solfege<br />
</td>
        <td>cents<br />
DMS<br />
</td>
        <td>approx. ratios of<br />
<a class="wiki_link" href="http://tel.wikispaces.com/2.3.5.13.17">2.3.5.13.17</a> <a class="wiki_link" href="http://xenharmonic.wikispaces.com/subgroup">subgroup</a><br />
</td>
        <td>additional ratios<br />
of the full <a class="wiki_link" href="http://xenharmonic.wikispaces.com/17-limit">17-limit</a><br />
</td>
        <td>pseudo-traditional<br />
notation<br />
</td>
    </tr>
    <tr>
        <td>0<br />
</td>
        <td>do<br />
</td>
        <td>0.0<br />
</td>
        <td>1/1<br />
</td>
        <td><br />
</td>
        <td>C = B^^ = A##<br />
</td>
    </tr>
    <tr>
        <td>1<br />
</td>
        <td>di<br />
</td>
        <td>35.294<br />
<span style="background-color: #ffffff;">10°35'18&quot;</span><br />
</td>
        <td><br />
</td>
        <td>50/49<br />
</td>
        <td>C ^<br />
</td>
    </tr>
    <tr>
        <td>2<br />
</td>
        <td>rih<br />
</td>
        <td>70.588<br />
<span style="background-color: #ffffff;">21°10'35&quot;</span><br />
</td>
        <td>25/24<br />
</td>
        <td><br />
</td>
        <td>Db = C ^^ = B#<br />
</td>
    </tr>
    <tr>
        <td>3<br />
</td>
        <td>ra<br />
</td>
        <td>105.882<br />
31°<span style="background-color: #ffffff;">35'18&quot;</span><br />
</td>
        <td>17/16, 18/17, 16/15<br />
</td>
        <td>15/14<br />
</td>
        <td>C#v = Db^<br />
</td>
    </tr>
    <tr>
        <td>4<br />
</td>
        <td>ru<br />
</td>
        <td>141.176<br />
<span style="background-color: #ffffff;">42°21'11&quot;</span><br />
</td>
        <td>13/12<br />
</td>
        <td>14/13, 12/11<br />
</td>
        <td>C#<br />
</td>
    </tr>
    <tr>
        <td>5<br />
</td>
        <td>reh<br />
</td>
        <td>176.471<br />
53°<span style="background-color: #ffffff;">58'28&quot;</span><br />
</td>
        <td>10/9<br />
</td>
        <td>11/10<br />
</td>
        <td>C#^ = Dv<br />
</td>
    </tr>
    <tr>
        <td>6<br />
</td>
        <td>re<br />
</td>
        <td>211.765<br />
<span style="background-color: #ffffff;">63°31'46&quot;</span><br />
</td>
        <td>9/8, 17/15<br />
</td>
        <td><br />
</td>
        <td>D<br />
</td>
    </tr>
    <tr>
        <td>7<br />
</td>
        <td>raw<br />
</td>
        <td>247.059<br />
74°<span style="background-color: #ffffff;">7'4&quot;</span><br />
</td>
        <td>15/13<br />
</td>
        <td>8/7<br />
</td>
        <td>D^<br />
</td>
    </tr>
    <tr>
        <td>8<br />
</td>
        <td>meh<br />
</td>
        <td>282.353<br />
<span style="background-color: #ffffff;">84°42'21&quot;</span><br />
</td>
        <td>20/17, 75/64<br />
</td>
        <td>7/6, 13/11<br />
</td>
        <td>Eb<br />
</td>
    </tr>
    <tr>
        <td>9<br />
</td>
        <td>me<br />
</td>
        <td>317.647<br />
95°<span style="background-color: #ffffff;">17'39&quot;</span><br />
</td>
        <td>6/5<br />
</td>
        <td>17/14<br />
</td>
        <td>D#v<br />
</td>
    </tr>
    <tr>
        <td>10<br />
</td>
        <td>mu<br />
</td>
        <td>352.941<br />
<span style="background-color: #ffffff;">105°52'56&quot;</span><br />
</td>
        <td>16/13<br />
</td>
        <td>11/9<br />
</td>
        <td>D#<br />
</td>
    </tr>
    <tr>
        <td>11<br />
</td>
        <td>mi<br />
</td>
        <td>388.235<br />
116°<span style="background-color: #ffffff;">28'14&quot;</span><br />
</td>
        <td>5/4<br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td>12<br />
</td>
        <td>maa<br />
</td>
        <td>423.529<br />
<span style="background-color: #ffffff;">127°3'32&quot;</span><br />
</td>
        <td>51/40, 32/25<br />
</td>
        <td>14/11, 9/7<br />
</td>
        <td>E<br />
</td>
    </tr>
    <tr>
        <td>13<br />
</td>
        <td>maw<br />
</td>
        <td>458.823<br />
<span style="background-color: #ffffff;">137°38'49&quot;</span><br />
</td>
        <td>13/10, 17/13<br />
</td>
        <td>22/17<br />
</td>
        <td>E^ = Fv<br />
</td>
    </tr>
    <tr>
        <td>14<br />
</td>
        <td>fa<br />
</td>
        <td>494.118<br />
<span style="background-color: #ffffff;">148°14'7&quot;</span><br />
</td>
        <td>4/3<br />
</td>
        <td><br />
</td>
        <td>F<br />
</td>
    </tr>
    <tr>
        <td>15<br />
</td>
        <td>fih<br />
</td>
        <td>529.412<br />
158°<span style="background-color: #ffffff;">49'15&quot;</span><br />
</td>
        <td><br />
</td>
        <td>15/11<br />
</td>
        <td>F^ = E#v<br />
</td>
    </tr>
    <tr>
        <td>16<br />
</td>
        <td>fu<br />
</td>
        <td>564.706<br />
<span style="background-color: #ffffff;">169°24'42&quot;</span><br />
</td>
        <td>18/13<br />
</td>
        <td>11/8<br />
</td>
        <td>Gb<br />
</td>
    </tr>
    <tr>
        <td>17<br />
</td>
        <td>fi/se<br />
</td>
        <td>600<br />
180°<br />
</td>
        <td>17/12, 24/17<br />
</td>
        <td>7/5, 10/7<br />
</td>
        <td>Gb^<br />
</td>
    </tr>
    <tr>
        <td>18<br />
</td>
        <td>su<br />
</td>
        <td>635.294<br />
<span style="background-color: #ffffff;">190°35'18&quot;</span><br />
</td>
        <td>13/9<br />
</td>
        <td>16/11<br />
</td>
        <td>F#<br />
</td>
    </tr>
    <tr>
        <td>19<br />
</td>
        <td>sih<br />
</td>
        <td>670.588<br />
<span style="background-color: #ffffff;">201°10'35&quot;</span><br />
</td>
        <td><br />
</td>
        <td>22/15<br />
</td>
        <td>F#^<br />
</td>
    </tr>
    <tr>
        <td>20<br />
</td>
        <td>sol<br />
</td>
        <td>705.882<br />
<span style="background-color: #ffffff;">211°45'53&quot;</span><br />
</td>
        <td>3/2<br />
</td>
        <td><br />
</td>
        <td>G<br />
</td>
    </tr>
    <tr>
        <td>21<br />
</td>
        <td>saw<br />
</td>
        <td>741.176<br />
<span style="background-color: #ffffff;">222°21'11&quot;</span><br />
</td>
        <td>20/13, 26/17<br />
</td>
        <td>17/11<br />
</td>
        <td>G^<br />
</td>
    </tr>
    <tr>
        <td>22<br />
</td>
        <td>leh<br />
</td>
        <td>776.471<br />
<span style="background-color: #ffffff;">233°58'28&quot;</span><br />
</td>
        <td>25/16, 80/51<br />
</td>
        <td>14/9<br />
</td>
        <td>Ab<br />
</td>
    </tr>
    <tr>
        <td>23<br />
</td>
        <td>le<br />
</td>
        <td>811.765<br />
<span style="background-color: #ffffff;">243°31'46&quot;</span><br />
</td>
        <td>8/5<br />
</td>
        <td><br />
</td>
        <td>Ab^<br />
</td>
    </tr>
    <tr>
        <td>24<br />
</td>
        <td>lu<br />
</td>
        <td>847.059<br />
<span style="background-color: #ffffff;">254°7'4&quot;</span><br />
</td>
        <td>13/8<br />
</td>
        <td>18/11<br />
</td>
        <td>G#<br />
</td>
    </tr>
    <tr>
        <td>25<br />
</td>
        <td>la<br />
</td>
        <td>882.353<br />
<span style="background-color: #ffffff;">264°42'21&quot;</span><br />
</td>
        <td>5/3<br />
</td>
        <td>28/17<br />
</td>
        <td>Av<br />
</td>
    </tr>
    <tr>
        <td>26<br />
</td>
        <td>laa<br />
</td>
        <td>917.647<br />
<span style="background-color: #ffffff;">275°17'39&quot;</span><br />
</td>
        <td>17/10<br />
</td>
        <td>12/7, 22/13<br />
</td>
        <td>A<br />
</td>
    </tr>
    <tr>
        <td>27<br />
</td>
        <td>law<br />
</td>
        <td>952.941<br />
285°<span style="background-color: #ffffff;">52'56&quot;</span><br />
</td>
        <td>26/15<br />
</td>
        <td>7/4<br />
</td>
        <td>A^ = Bbv =G##<br />
</td>
    </tr>
    <tr>
        <td>28<br />
</td>
        <td>teh<br />
</td>
        <td>988.235<br />
<span style="background-color: #ffffff;">296°28'14&quot;</span><br />
</td>
        <td>16/9, 30/17<br />
</td>
        <td><br />
</td>
        <td>Bb<br />
</td>
    </tr>
    <tr>
        <td>29<br />
</td>
        <td>te<br />
</td>
        <td>1023.529<br />
307°<span style="background-color: #ffffff;">3'32&quot;</span><br />
</td>
        <td>9/5<br />
</td>
        <td>20/11<br />
</td>
        <td>Bb^<br />
</td>
    </tr>
    <tr>
        <td>30<br />
</td>
        <td>tu<br />
</td>
        <td>1058.823<br />
<span style="background-color: #ffffff;">317°38'49&quot;</span><br />
</td>
        <td>24/13<br />
</td>
        <td>13/7, 11/6<br />
</td>
        <td>A#<br />
</td>
    </tr>
    <tr>
        <td>31<br />
</td>
        <td>ti<br />
</td>
        <td>1094.118<br />
328°<span style="background-color: #ffffff;">14'7&quot;</span><br />
</td>
        <td>32/17, 17/9, 15/8<br />
</td>
        <td>28/15<br />
</td>
        <td>A#^ = Bv<br />
</td>
    </tr>
    <tr>
        <td>32<br />
</td>
        <td>taa<br />
</td>
        <td>1129.412<br />
<span style="background-color: #ffffff;">338°49'15&quot;</span><br />
</td>
        <td>48/25<br />
</td>
        <td><br />
</td>
        <td>B<br />
</td>
    </tr>
    <tr>
        <td>33<br />
</td>
        <td>da<br />
</td>
        <td>1164.706<br />
349°<span style="background-color: #ffffff;">24'42&quot;</span><br />
</td>
        <td><br />
</td>
        <td>49/25<br />
</td>
        <td>B^ = A##v<br />
</td>
    </tr>
</table>

<br />
<!-- ws:start:WikiTextHeadingRule:10:&lt;h2&gt; --><h2 id="toc5"><a name="Intervals:-Selected just intervals by error"></a><!-- ws:end:WikiTextHeadingRule:10 -->Selected just intervals by error</h2>
 The following table shows how <a class="wiki_link" href="/Just-24">some prominent just intervals</a> are represented in 34edo (ordered by absolute error).<br />


<table class="wiki_table">
    <tr>
        <td><strong>Interval, complement</strong><br />
</td>
        <td><strong>Error (abs., in <a class="wiki_link" href="/cent">cents</a>)</strong><br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/15_13">15/13</a>, <a class="wiki_link" href="/26_15">26/15</a><br />
</td>
        <td style="text-align: center;">0.682<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/18_13">18/13</a>, <a class="wiki_link" href="/13_9">13/9</a><br />
</td>
        <td style="text-align: center;">1.324<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/5_4">5/4</a>,     <a class="wiki_link" href="/8_5">8/5</a><br />
</td>
        <td style="text-align: center;">1.922<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/6_5">6/5</a>,     <a class="wiki_link" href="/5_3">5/3</a><br />
</td>
        <td style="text-align: center;">2.006<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/13_12">13/12</a>, <a class="wiki_link" href="/24_13">24/13</a><br />
</td>
        <td style="text-align: center;">2.604<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/4_3">4/3</a>,     <a class="wiki_link" href="/3_2">3/2</a><br />
</td>
        <td style="text-align: center;">3.927<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/13_10">13/10</a>, <a class="wiki_link" href="/20_13">20/13</a><br />
</td>
        <td style="text-align: center;">4.610<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/11_9">11/9</a>,   <a class="wiki_link" href="/18_11">18/11</a><br />
</td>
        <td style="text-align: center;">5.533<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/16_15">16/15</a>, <a class="wiki_link" href="/15_8">15/8</a><br />
</td>
        <td style="text-align: center;">5.849<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/10_9">10/9</a>,   <a class="wiki_link" href="/9_5">9/5</a><br />
</td>
        <td style="text-align: center;">5.933<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/14_11">14/11</a>, <a class="wiki_link" href="/11_7">11/7</a><br />
</td>
        <td style="text-align: center;">6.021<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/16_13">16/13</a>, <a class="wiki_link" href="/13_8">13/8</a><br />
</td>
        <td style="text-align: center;">6.531<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/13_11">13/11</a>, <a class="wiki_link" href="/22_13">22/13</a><br />
</td>
        <td style="text-align: center;">6.857<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/15_11">15/11</a>, <a class="wiki_link" href="/22_15">22/15</a><br />
</td>
        <td style="text-align: center;">7.539<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/9_8">9/8</a>,     <a class="wiki_link" href="/16_9">16/9</a><br />
</td>
        <td style="text-align: center;">7.855<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/12_11">12/11</a>, <a class="wiki_link" href="/11_6">11/6</a><br />
</td>
        <td style="text-align: center;">9.461<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/11_10">11/10</a>, <a class="wiki_link" href="/20_11">20/11</a><br />
</td>
        <td style="text-align: center;">11.466<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/9_7">9/7</a>,     <a class="wiki_link" href="/14_9">14/9</a><br />
</td>
        <td style="text-align: center;">11.555<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/14_13">14/13</a>, <a class="wiki_link" href="/13_7">13/7</a><br />
</td>
        <td style="text-align: center;">12.878<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/11_8">11/8</a>,   <a class="wiki_link" href="/16_11">16/11</a><br />
</td>
        <td style="text-align: center;">13.388<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/15_14">15/14</a>, <a class="wiki_link" href="/28_15">28/15</a><br />
</td>
        <td style="text-align: center;">13.560<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/7_6">7/6</a>,     <a class="wiki_link" href="/12_7">12/7</a><br />
</td>
        <td style="text-align: center;">15.482<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/8_7">8/7</a>,     <a class="wiki_link" href="/7_4">7/4</a><br />
</td>
        <td style="text-align: center;">15.885<br />
</td>
    </tr>
    <tr>
        <td style="text-align: center;"><a class="wiki_link" href="/7_5">7/5</a>,     <a class="wiki_link" href="/10_7">10/7</a><br />
</td>
        <td style="text-align: center;">17.488<br />
</td>
    </tr>
</table>

<br />
<!-- ws:start:WikiTextHeadingRule:12:&lt;h2&gt; --><h2 id="toc6"><a name="Intervals:-Notations"></a><!-- ws:end:WikiTextHeadingRule:12 --><span style="background-color: #ffffff;">Notations</span></h2>
 The chain of fifths gives you the seven naturals, and their sharps and flats. The sharp or flat of a note is (what is commonly called) a neutral second away - the double-sharp means a minor third away from the natural. This has led certain &quot;complainers&quot;, in seeking to notate 17 edo, to create an extra character to raise something a small step of which. To render this symbol philosophically harmonious with 34 tone equal temperament, a symbol indicating an adjustment of 1/34 up or down serves the purpose by using two of it, doubled laterally or vertically as composer. This however emphasizes certain aspects of 34edo which <em>may not be most efficient expressions of some musical purposes.</em> The reader can construct his own notation to the needs of the music and performer. As an example, a system with 15 &quot;nominals&quot; like A, B, C ... F, instead of seven, might be waste - of paper, or space, or memory if they aren't used consecutively frequently. The system spelled out here has familiarity as an advantage and disadvantage. The spacing of the nominals and lines is the same. Dense chords of certain types would be very impossible to notate. Finally, the table uses ^ and v for &quot;up&quot; and &quot;down&quot;, but these might be reserved for adjustments of 1/68th of an octave, being hollow, and filled in triangles are recommended. <br />
<br />
<!-- ws:start:WikiTextHeadingRule:14:&lt;h2&gt; --><h2 id="toc7"><a name="Intervals:-Commas"></a><!-- ws:end:WikiTextHeadingRule:14 --><span style="background-color: #ffffff;">Commas</span></h2>
 <span style="background-color: #ffffff;">34-EDO <a class="wiki_link" href="http://xenharmonic.wikispaces.com/tempering%20out">tempers out</a> the following <a class="wiki_link" href="http://xenharmonic.wikispaces.com/comma">comma</a>s. (Note: This assumes the <a class="wiki_link" href="http://xenharmonic.wikispaces.com/val">val</a> &lt; <a class="wiki_link" href="http://tel.wikispaces.com/34%2054%2079%2095%20118%20126">34 54 79 95 118 126</a> |.)</span><br />


<table class="wiki_table">
    <tr>
        <th><span style="display: block; text-align: center;"><span style="display: block; text-align: center;"><strong>Comma</strong></span></span><br />
</th>
        <th><span style="display: block; text-align: center;"><span style="display: block; text-align: center;"><strong>Monzo</strong></span></span><br />
</th>
        <th><span style="display: block; text-align: center;"><span style="display: block; text-align: center;"><strong>Value (Cents)</strong></span></span><br />
</th>
        <th><span style="display: block; text-align: center;"><span style="display: block; text-align: center;"><strong>Name 1</strong></span></span><br />
</th>
        <th><span style="display: block; text-align: center;"><span style="display: block; text-align: center;"><strong>Name 2</strong></span></span><br />
</th>
        <th><span style="display: block; text-align: center;"><span style="display: block; text-align: center;"><strong>Name 3</strong></span></span><br />
</th>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">134217728/129140163</span></span><br />
</td>
        <td>| 27 -17 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">66.765</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">17-comma</span></span><br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">20000/19683</span></span><br />
</td>
        <td>| 5 -9 4 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">27.660</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Minimal Diesis</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Tetracot Comma</span></span><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">2048/2025</span></span><br />
</td>
        <td>| 11 -4 -2 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">19.553</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Diaschisma</span></span><br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">393216/390625</span></span><br />
</td>
        <td>| 17 1 -8 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">11.445</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Würschmidt comma</span></span><br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">15625/15552</span></span><br />
</td>
        <td>| -6 -5 6 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">8.1073</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Kleisma</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Semicomma Majeur</span></span><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">1212717/1210381</span></span><br />
</td>
        <td>| 23 6 -14 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">3.338</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Vishnuzma</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Semisuper</span></span><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">1029/1000</span></span><br />
</td>
        <td>| -3 1 -3 3 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">49.492</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Keega</span></span><br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="color: blue; display: block; text-align: center;"><a class="wiki_link" href="http://xenharmonic.wikispaces.com/49_48">49/48</a></span><br />
</span><br />
</td>
        <td>| -4 -1 0 2 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">35.697</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Slendro Diesis</span></span><br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">875/864</span></span><br />
</td>
        <td>| -5 -3 3 1 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">21.902</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Keema</span></span><br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">126/125</span></span><br />
</td>
        <td>| 1 2 -3 1 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">13.795</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Starling comma</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Septimal semicomma</span></span><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">100/99</span></span><br />
</td>
        <td>| 2 -2 2 0 -1&gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">17.399</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Ptolemisma</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Ptolemy's comma</span></span><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">243/242</span></span><br />
</td>
        <td>| -1 5 0 0 -2 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">7.1391</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Rastma</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Neutral third comma</span></span><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">385/384</span></span><br />
</td>
        <td>| -7 -1 1 1 1 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">4.5026</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Keenanisma</span></span><br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
    <tr>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">91/90</span></span><br />
</td>
        <td>| -1 -2 -1 1 0 1 &gt;<br />
</td>
        <td><span style="display: block; text-align: right;"><span style="display: block; text-align: right;">19.120</span></span><br />
</td>
        <td><span style="display: block; text-align: center;"><span style="display: block; text-align: center;">Superleap</span></span><br />
</td>
        <td><br />
</td>
        <td><br />
</td>
    </tr>
</table>

<br />
<br />
<!-- ws:start:WikiTextHeadingRule:16:&lt;h2&gt; --><h2 id="toc8"><a name="Intervals:-Listen"></a><!-- ws:end:WikiTextHeadingRule:16 -->Listen</h2>
 <ul><li><a class="wiki_link_ext" href="http://www.archive.org/details/Ascension_105" rel="nofollow" target="_blank">Ascension</a></li><li><a class="wiki_link_ext" href="https://www.youtube.com/watch?v=FXTM0HeuExk" rel="nofollow" target="_blank">Uncomfortable In Crowds (extended)</a> by Robin Perry</li></ul><!-- ws:start:WikiTextHeadingRule:18:&lt;h2&gt; --><h2 id="toc9"><a name="Intervals:-Links"></a><!-- ws:end:WikiTextHeadingRule:18 -->Links</h2>
 <ul><li><a class="wiki_link_ext" href="http://www.microstick.net/34guitararticle.htm" rel="nofollow">34 Equal Guitar</a> by <a class="wiki_link" href="http://xenharmonic.wikispaces.com/Larry%20Hanson">Larry Hanson</a></li><li><a class="wiki_link_ext" href="https://microstick.net" rel="nofollow">http://microstick.net/</a> websites of Neil Haverstick</li><li><a class="wiki_link_ext" href="https://myspace.com/microstick" rel="nofollow">https://myspace.com/microstick</a></li></ul></body></html>

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