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Module:Ups and downs notation: Difference between revisions

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Line 1: Line 1:
-- WIP
-- WIP


local ET = require('Module:ET')
local et = require('Module:ET')
local rat = require('Module:Rational')
local rat = require('Module:Rational')
local p = {}
local p = {}
Line 23: Line 23:
-- }
-- }


function p.get_note_names(et)
function p.get_note_names(tuning)
local note_names = {}
local note_names = {}
local i = 0
local i = 0
local last_note = 0
while i < tuning.size do
while i < et.size do
note_names[i] = {}
note_names[i] = {}
end
end
local fifth = ET.approximate(et, rat.new(3, 2))
local fifth = et.approximate(tuning, rat.new(3, 2))
local fourth = ET.approximate(et, rat.new(4, 3))
local fourth = et.approximate(tuning, rat.new(4, 3))
local chroma = (fifth * 7) % et.size
local chroma = (fifth * 7) % et.size
-- Add major scale notes
-- Add major scale notes
table.insert(note_names[0], "C")
table.insert(note_names[0], "C")
table.insert(note_names[(fifth * 2) % et.size], "D")
table.insert(note_names[(fifth * 2) % tuning.size], "D")
table.insert(note_names[(fifth * 4) % et.size], "E")
table.insert(note_names[(fifth * 4) % tuning.size], "E")
table.insert(note_names[fourth], "F")
table.insert(note_names[fourth], "F")
table.insert(note_names[fifth], "G")
table.insert(note_names[fifth], "G")
table.insert(note_names[(fifth * 3) % et.size], "A")
table.insert(note_names[(fifth * 3) % tuning.size], "A")
     table.insert(note_names[(fifth * 5) % et.size], "B")
     table.insert(note_names[(fifth * 5) % tuning.size], "B")
     table.insert(note_names[et.size], "C")
     table.insert(note_names[et.size], "C")
i = 0
i = 0
local last_major_note = 0
local last_major_note = 0
while i < et.size do
while i < tuning.size do
if #(note_names[i]) == 0 then
if #(note_names[i]) == 0 then
local num_sharps = math.floor((i - last_major_note) / chroma)
local num_sharps = math.floor((i - last_major_note) / chroma)
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