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  WORK-IN-PROGRESS AS OF 07MAY2025
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The tonality diamond is a symmetric organization of otonal and utonal chords based around a central note and bounded by an odd-limit. First formalized in the 7-odd-limit by Max F Meyer in 1929, they became central to the music and theories of Harry Partch, who built his tonal system around the 11-odd-limit tonality diamond. The principle has been used both conceptually (such as for target intervals of temperaments) and practically (such as for instrument layouts) in xenharmonics ever since.  
The tonality diamond is a symmetric organization of [[Otonality and utonality|otonal and utonal]] chords based around a central note and bounded by an [[Odd limit|odd-limit]]. First formalized in the [[7-odd-limit]] by [[wikipedia:Max_Friedrich_Meyer|Max F. Meyer]] in 1929, they became central to the music and theories of [[Harry Partch]], who built his tonal system around the [[11-odd-limit]] tonality diamond. The principle has been used both conceptually (such as for [[Target tuning|targets]] of [[temperaments]]) and practically (such as for instrument layouts) in xenharmonics ever since.  


[https://nickvuci.github.io/wiki-applets/tonalityDiamond.html '''Play some tonality diamonds to hear how they sound.''']
[https://nickvuci.github.io/wiki-applets/tonalityDiamond.html '''Play some tonality diamonds to hear how they sound.''']
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== History ==
== History ==
The tonality diamond was first formally explained by Max F. Meyer in his 1929 publication ''The Musician's Arithmetic''<ref>https://archive.org/details/max-f-meyer-the-musicians-arithmetic/page/22/mode/2up</ref> using the 7-odd-limit. Even though Harry Partch gives a different story for how he discovered the concept, it is likely this source that gave him the idea, which he then extended to the 11-odd-limit and made the basis of his tonal system.
The tonality diamond was first formally explained by Max F. Meyer in his 1929 publication ''The Musician's Arithmetic''<ref>https://archive.org/details/max-f-meyer-the-musicians-arithmetic/page/22/mode/2up</ref> using the 7-odd-limit.


Erv Wilson in particular was inspired by the tonality diamond and developed a number of "diamonds" himself.<ref>https://anaphoria.com/diamond.pdf</ref> 
Even though Harry Partch gives a different story for how he discovered the concept, it is likely this source that gave him the idea, which he then extended to the 11-odd-limit and made the basis of his tonal system.  


The first novel xenharmonic temperament — George Secor's later-named "Miracle" temperament — was made to approximate Partch's 11-limit diamond.
[[Erv Wilson]] in particular was inspired by the tonality diamond and developed a number of "diamonds" himself.<ref>https://anaphoria.com/diamond.pdf</ref> 
 
The first novel xenharmonic temperament — [[George Secor|George Secor's]] later-named "[[Miracle]]" temperament — was made to approximate Partch's 11-limit diamond.


== Uses ==
== Uses ==


=== Instrument layout ===
=== Instrument layout ===
The most famous example of the tonality diamond as a practical layout for an instrument is Harry Partch's "Diamond Marimba," which uses the 11-odd-limit tonality diamond exactly. This idea was explored further with Partch's "Quadrangularis Reversum," and by Cris Forster with his 13-odd-limit "Diamond Marimba."  
The most famous example of the tonality diamond as a practical layout for an instrument is Harry Partch's "Diamond Marimba," which uses the 11-odd-limit tonality diamond exactly. This idea was explored further with Partch's "Quadrangularis Reversum," and by Cris Forster with his [[13-odd-limit]] "Diamond Marimba."  


[https://sintel.website/posts/diamond_marimba.html '''Play with Partch’s Diamond Marimba here.''']
[https://sintel.website/posts/diamond_marimba.html '''Play with Partch’s Diamond Marimba here.''']
== See also ==
* [[Cross-set scale]]
* [[Diamond function|Diamond Function]]
* [[Lattice]]


== References ==
== References ==