2-limit: Difference between revisions

Rework intro and improve linking
Re-add what it's equivalent to. These were all linked to each other so this page shouldn't be a dead end.
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{{Prime limit navigation|2}}
{{Prime limit navigation|2}}
The '''2-limit''' consists of [[interval]]s that are either an integer whose only prime factor is 2, or the reciprocal of such an integer. Naturally, since [[2/1]] is the octave, this limits us to unisons, octaves and stacks of octaves. The 2-limit can be represented by any [[edo]].


The '''2-limit''' consists of [[interval]]s that are either an integer whose only prime factor is 2, or the reciprocal of such an integer. Naturally, since [[2/1]] is the octave, this limits us to unisons,<ref>[http://www.tonalsoft.com/enc/l/limit.aspx#MainContent Tonalsoft Encylopedia | ''limit'']</ref> octaves and stacks of octaves. The 2-limit is fundamental to any sort of [[edo]], with [[1edo]] being the easiest and simplest to grasp.
Since humans tend to perceive notes an octave apart as having the same pitch class, the 2-limit is said to be "easy to collapse", with this collapse being generally implemented in lattices. This will reduce the dimensionality of the lattice by one, allowing the [[5-limit]] (whose intervals are represented by 3 coordinates corresponding to each prime) to be drawn in 2 dimensions, forming the familiar classical [[Tonnetz]].


Due to the human ability to perceive notes an octave apart as having the same pitch class, the 2-limit also collapses very easily, with this collapse being generally implemented in lattices.  This collapse is helpful to understanding the pitches involved in other prime axes within the space of a single octave, should you add other primes to the mix.
The 2-limit is equivalent to the [[1-odd-limit]], [[1edo]], and 1-''p''-fdo with arbitrary value of ''p'' (including [[AFDO|1afdo]] and [[IFDO|1ifdo]]).
 
The 2-limit is equivalent to the [[1-odd-limit]].


== See also ==
== See also ==
* [[Harmonic limit]]
* [[Harmonic limit]]
* [[Gallery of just intervals]]
* [[Gallery of just intervals]]
== References ==
<references />


[[Category:2-limit| ]] <!-- main article -->
[[Category:2-limit| ]] <!-- main article -->
[[Category:1-odd-limit]]
[[Category:1edo]]