From 0fb87d18189c4fbb794a4c012c6dfcd49419cce0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Olivier=20Doar=C3=A9?= <olivier.doare@ensta-paris.fr>
Date: Tue, 4 Mar 2025 15:02:39 +0100
Subject: [PATCH 1/2] Scale:circle_of_5ths_rotate

---
 scale.lua | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/scale.lua b/scale.lua
index adc55b1..640d23d 100644
--- a/scale.lua
+++ b/scale.lua
@@ -106,6 +106,22 @@ function Scale:to_the_right_on_circle_of_5ths(iterations)
     :to_the_right_on_circle_of_5ths(iterations -1)
 end
 
+--[[
+  Warning: only works for ionian scales
+]]
+function Scale:circle_of_5ths_rotate(iterations)
+  if(iterations == 0) then
+    return self
+  elseif(iterations < 0) then
+    return self:to_the_left_on_circle_of_5ths(-iterations)
+  elseif(iterations > 0) then
+    return self:to_the_right_on_circle_of_5ths(iterations)
+  else
+    return "Error"
+  end
+end
+
+
 --[[
   Returns a new scale based on self, rotated from note_offset
   note_offset: 

From d12c6540b9f0b351c31f37dd417e0871dd563414 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Olivier=20Doar=C3=A9?= <olivier.doare@ensta-paris.fr>
Date: Tue, 25 Mar 2025 22:11:04 +0100
Subject: [PATCH 2/2] ChordBuilder:extend

---
 chord.lua | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/chord.lua b/chord.lua
index 34e5518..345c2c8 100644
--- a/chord.lua
+++ b/chord.lua
@@ -336,6 +336,20 @@ function ChordBuilder:clone()
   return b
 end
 
+-- extensions is a table of 4 elements, false or true
+-- the first element is the seventh,
+-- the second is the ninth,
+-- the third is the eleventh,
+-- the fourth is the thirteenth
+function ChordBuilder:extend(extensions)
+  local b = self:clone()
+  b.seventh = extensions[1]
+  b.ninth = extensions[2]
+  b.eleventh = extensions[3]
+  b.thirteenth = extensions[4]
+  return b
+end
+
 function ChordBuilder:withSeventh()
   local b = self:clone()
   b.seventh = true