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→Xenharmonic systems for nelinda: added note on temperament
 
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The '''nelinda''' is a conceptual family of single-reed instruments developed by [https://www.youtube.com/user/TruncatedTriangle/ TruncatedTriangle]. In contrast to the conical-bore saxophone, which produces all (1n+1) harmonics, and the cylindrical-bore clarinet, which produces mostly odd-numbered (2n+1) harmonics, the nelinda has a taper opposite in direction to the saxophone (that is, wider at the mouthpiece end and narrower at the bell end) designed to highlight the ''3n+1'' harmonics (that is, harmonics 1, 4 ,7, 10, 13, etc.)
The '''nelinda''' is a hypothetical family of single-reed instruments developed by [https://www.youtube.com/user/TruncatedTriangle/ TruncatedTriangle]. In contrast to the conical-bore saxophone, which produces all harmonics, and the cylindrical-bore clarinet, which produces mostly odd-numbered ({{nowrap| 2''n'' + 1 }}) harmonics, the nelinda has a taper opposite in direction to the saxophone (that is, wider at the mouthpiece end and narrower at the bell end) designed to highlight the {{nowrap| 3''n'' + 1 }} harmonics (that is, harmonics 1, 4, 7, 10, 13, etc.)


This implies that it will overblow not at the octave/ditave (2/1) or the twelfth/tritave (3/1) like other single-reeds, but instead at the fifteenth or double octave (4/1), giving it a wide range.
This implies that it will overblow not at the octave/ditave (2/1) or the twelfth/tritave (3/1) like other single-reeds, but instead at the fifteenth or double octave (4/1), giving it a wide range.


=Xenharmonic Systems for Nelinda=
== Xenharmonic systems for nelinda ==
 
Similar to the mutual affinity between the tritave-repeating [[Bohlen–Pierce]] scale and the clarinet, with its spectrum of odd harmonics, a tuning system specifically for a (3''n'' + 1) spectrum like the nelinda can be developed, repeating at the 4/1 ratio (or ''tetratave'').
Similar to the mutual affinity between the tritave-repeating [[Bohlen-Pierce]] scale and the clarinet, with its spectrum of odd harmonics, a tuning system specifically for a 3n+1 spectrum like the nelinda can be developed, repeating at the 4/1 ratio (or ''tetratave'').


4:7:10:13 would serve as the basic chord for such a system, directly analogous to 4:5:6(:7) in "normal" ditave-repeating music and 3:5:7 for BP. This translates without issue to working within a 4.7.10.13 JI subgroup, of which [[640/637]] is a notable comma.
4:7:10:13 would serve as the basic chord for such a system, directly analogous to 4:5:6(:7) in "normal" ditave-repeating music and 3:5:7 for BP. This translates without issue to working within a 4.7.10.13 JI subgroup, of which [[640/637]] is a notable comma.


Searching in Graham Breed's temperament finder for said comma, we quickly find the 27&20 (with respect to the tetratave) [http://x31eq.com/cgi-bin/rt.cgi?ets=14qddrrrfff_10p&limit=4_7_10_13 linear temperament], which we could call ''Nelindic''. It has an approximate 16/13 as its generator and forms MOS of 6, 7, and 13 notes for starters, the latter of which yields a good albitonic scale.
The {{nowrap| 20 & 27 }} (with respect to the tetratave) [https://sintel.pythonanywhere.com/result?subgroup=4.7.10.13&reduce=on&weights=weil&target=&edos=20%2C27&submit_edo=submit&commas= linear temperament] is a notable entry that tempers out the said comma, which we could call ''nelindic'', and corresponds to [[huntington]] excluding every other peiod. It has an approximate 16/13 as its generator and forms [[mos]] of 6, 7, and 13 notes for starters, the latter of which yields a good albitonic scale. [[27ed4]] is an okay tuning for nelindic (especially with compression), but [[47ed4]] ''really'' knocks it out of the park (similar to 12ed2 vs 31ed2 for 2.3.5). Note that 20ed4 is just 10edo, where 5/4 (and possibly also 7/4) is tuned too flat,.
 
[[27ed4]] is an okay tuning for Nelindic (especially with compression), but [[47ed4]] ''really'' knocks it out of the park (similar to 12ed2 vs 31ed2 for 2.3.5).
 
= Decimophone =
Unlike the saxophone, the nelinda is still viable as an instrument with its taper reversed (that is, narrower at the mouthpiece end and wider at the bell end).  This will be the branch of the '''decimophone''' which highlights the 3n+''2'' harmonics (that is, harmonics 2, 5, 8, 11, 14 etc.)
 
This implies that overblowing at the major tenth, unlike other common full tubes, but instead like partial-tube trumpets, does not highlight the fundamental.
 
= Xenharmonic Systems for Decimophone =
Similar to the mutual affinity between the tritave-repeating [[Bohlen-Pierce]] scale and the clarinet, with its spectrum of odd harmonics, a tuning system specifically for a 3n+2 spectrum like the decimophone can be developed, repeating at the 5/2 ratio (or ''major decade'').
 
2:5:8:11 would serve as the basic chord for such a system, directly analogous to 4:5:6(:7) in "normal" ditave-repeating music and 3:5:7 for BP. This translates without issue to working within a 2.5.8.11 JI subgroup, of which [[128/125]] is a notable comma.


Searching in Graham Breed's temperament finder for said comma, we quickly find the 4n (with respect to the major decade) [http://x31eq.com/cgi-bin/uv.cgi linear temperament], which we call ''[[Augmented family|augmented]].'' It is clear this is not a very interesting result, being nothing more than a less intuitively useful way of looking at [[12edo]].
[[Category:Instruments]]
[[Category:Nonoctave]]
[[Category:Subgroup]]
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