3 files changed, 14 insertions, 13 deletions
diff --git a/fretboard.mjs b/fretboard.mjs
index 4254d3a..4f5344e 100644
--- a/fretboard.mjs
+++ b/fretboard.mjs
@@ -12,17 +12,17 @@ const strings = {
 
 // true if not a natural note
 function isAccidental(note) {
-    return note[1] === '#' || note[1] === 'b';
+    return note[1] === '♯' || note[1] === '♭';
 }
 
-// convert ‘Eb’ to ‘D#’ and vice versa.
+// convert ‘E♭’ to ‘D♯’ and vice versa.
 function alternateAccidental(note) {
     const root = chromaticScale.indexOf(note[0]);
     switch (note[1]) {
-    case '#':
-        return `${chromaticScale[root+2]}b`;
-    case 'b':
-        return `${chromaticScale[root-1]}#`;
+    case '♯':
+        return `${chromaticScale[root+2]}♭`;
+    case '♭':
+        return `${chromaticScale[root-1]}♯`;
     default:
         return note;
     }
diff --git a/index.html b/index.html
index 94e9a82..fc12e45 100644
--- a/index.html
+++ b/index.html
@@ -101,17 +101,17 @@
         <label for='tonic'>tonic:</label>
         <select id='tonic' name='tonic'>
           <option value='A'>A</option>
-          <option value='A#'>A#</option>
+          <option value='A♯'>A♯</option>
           <option value='B'>B</option>
           <option value='C' selected>C</option>
-          <option value='C#'>C#</option>
+          <option value='C♯'>C♯</option>
           <option value='D'>D</option>
-          <option value='D#'>D#</option>
+          <option value='D♯'>D♯</option>
           <option value='E'>E</option>
           <option value='F'>F</option>
-          <option value='F#'>F#</option>
+          <option value='F♯'>F♯</option>
           <option value='G'>G</option>
-          <option value='G#'>G#</option>
+          <option value='G♯'>G♯</option>
         </select>
         <label for='diatonic'>diatonic:</label>
         <select id='diatonic' name='diatonic'>
diff --git a/scale.mjs b/scale.mjs
index 9e0e122..b4f043d 100644
--- a/scale.mjs
+++ b/scale.mjs
@@ -5,12 +5,13 @@ const ringHandler = {
 };
 
 export const chromaticScale = new Proxy(
-    ['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#'],
+    ['A', 'A♯', 'B', 'C', 'C♯', 'D', 'D♯', 'E', 'F', 'F♯', 'G', 'G♯'],
     ringHandler);
 
 function scaleFromIntervals(tonic, intervals) {
     const scaleIndex = chromaticScale.indexOf(tonic);
     if (scaleIndex < 0) {
+        console.error('tonic not found in scale', tonic, chromaticScale);
         return undefined;
     }
 
@@ -24,7 +25,7 @@ function scaleFromIntervals(tonic, intervals) {
         // accidentals.
         if (note[0] === lastBase) {
             const nextBase = chromaticScale[scaleIndex + steps + 1][0];
-            scale.push(`${nextBase}b`)
+            scale.push(`${nextBase}♭`)
             lastBase = nextBase[0];
         } else {
             scale.push(note);