23 lines
1.2 KiB
Clojure
23 lines
1.2 KiB
Clojure
(ns music)
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;; an octave is an int, e.g. 4
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;; a pitch class is a keyword from :Abb to G##
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;; a pitch is a [pitch class, octave] vector, e.g. [:C 4] is middle C
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;; a duration is a rational number, e.g. 1/8
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;; a note has a duration, optionally a pitch, and optionally any other necessary keys (e.g. loudness)
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;; {:duration 1/8 :pitch [:A# 3]} is a note. {:duration 1/4} is a note (really, a rest)
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;; (:=: noteA noteB) represents noteA played simultaneously with noteB
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;; (:+: noteA noteB) represents noteA played followed by noteB
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;; what do the above functions return? Whatever that thing is, a note is a "subtype" of it
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;; since the :=: and :+: operations can be applied to their return values
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;; one solution would be to have [noteA noteB] represent noteA and noteB played sequentially
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;; and [[noteA noteB]] represent noteA and noteB played simultaneously -- this would
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;; mean that :=: and :+: would have to act on vectors
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;; this would allow arbitrary musical phrases, e.g. [noteA [noteB noteC] noteD], but what
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;; would deeper nesting mean?
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;; (modify noteA control) merges the control map into the noteA map
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;; control maps have keys like ::tempo, ::transpose, ::instrument, ::phrase, ::player, ::keysig
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