From d69720d09760d153bb2059e57da3a4ed6c59e142 Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@spork.org>
Date: Sun, 9 Mar 2025 14:37:18 -0400
Subject: use ‘tonic’ rather than ‘root’
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i dunno, makes me seem like i know what i'm talking about. to me, at
least.
---
 index.html |  8 ++++----
 scale.mjs  | 26 +++++++++++++-------------
 2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/index.html b/index.html
index 1c0afff..bb5fb32 100644
--- a/index.html
+++ b/index.html
@@ -98,8 +98,8 @@
     <form id='key-picker'>
       <fieldset>
         <legend>key</legend>
-        <label for='root'>root note:</label>
-        <select id='root' name='root'>
+        <label for='tonic'>tonic:</label>
+        <select id='tonic' name='tonic'>
           <option value='A'>A</option>
           <option value='B'>B</option>
           <option value='C' selected>C</option>
@@ -108,8 +108,8 @@
           <option value='F'>F</option>
           <option value='G'>G</option>
         </select>
-        <label for='foo'></label>
-        <select id='foo' name='foo'>
+        <label for='diatonic'>diatonic:</label>
+        <select id='diatonic' name='diatonic'>
           <option value='major' selected>major</option>
           <option value='minor'>minor</option>
         </select>
diff --git a/scale.mjs b/scale.mjs
index b781f14..045265b 100644
--- a/scale.mjs
+++ b/scale.mjs
@@ -8,15 +8,15 @@ export const chromaticScale = new Proxy(
     ['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#'],
     ringHandler);
 
-function scaleFromIntervals(root, intervals) {
-    const scaleIndex = chromaticScale.indexOf(root);
+function scaleFromIntervals(tonic, intervals) {
+    const scaleIndex = chromaticScale.indexOf(tonic);
     if (scaleIndex < 0) {
         return undefined;
     }
 
-    let scale = [root];
+    let scale = [tonic];
     let steps = 0;
-    let lastBase = root[0];
+    let lastBase = tonic[0];
     for (let i = 0; i < intervals.length; i++) {
         steps += intervals[i];
         const note = chromaticScale[scaleIndex + steps];
@@ -35,8 +35,8 @@ function scaleFromIntervals(root, intervals) {
 }
 
 class Scale {
-    constructor(root, intervals) {
-        this.scale = scaleFromIntervals(root, intervals);
+    constructor(tonic, intervals) {
+        this.scale = scaleFromIntervals(tonic, intervals);
         return new Proxy(this, {
             get(target, prop) {
                 if (prop in target) {
@@ -48,7 +48,7 @@ class Scale {
         });
     }
 
-    get root() {
+    get tonic() {
         return this.scale[0];
     }
 
@@ -70,14 +70,14 @@ class Scale {
     }
 }
 
-export function MajorScale(root) {
-    console.debug(`MajorScale(${root})`);
+export function MajorScale(tonic) {
+    console.debug(`MajorScale(${tonic})`);
     const intervals = [2, 2, 1, 2, 2, 2];
-    return new Scale(root, intervals);
+    return new Scale(tonic, intervals);
 }
 
-export function MinorScale(root) {
-    console.debug(`MinorScale(${root})`);
+export function MinorScale(tonic) {
+    console.debug(`MinorScale(${tonic})`);
     const intervals = [2, 1, 2, 2, 1, 2];
-    return new Scale(root, intervals);
+    return new Scale(tonic, intervals);
 }
-- 
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