enharmonic equivalents for # notes

app.js

@@ -11,7 +11,20 @@ const synth = new Tone.Synth().toDestination()
 let newTone
 let lowest = 'a0'
 let highest = 'c8'
-const notes = ['c', 'c#', 'd', 'd#', 'e', 'f', 'f#', 'g', 'g#', 'a', 'a#', 'b' ]
+const notes = [
+	['c'],
+	['c#','db'],
+	['d'],
+	['d#', 'eb'],
+	['e'],
+	['f'],
+	['f#','gb'],
+	['g'],
+	['g#', 'ab'],
+	['a'],
+	['a#', 'bb'],
+	['b']
+]
 
 minInput.setAttribute('placeholder', lowest)
 maxInput.setAttribute('placeholder', highest)
@@ -28,9 +41,9 @@ generateNoteButton.addEventListener('click', () => {
 	Tone.start()
 
 	const lowOctave = parseInt(lowest.charAt(1)) * 12
-	const lowNote = notes.indexOf(lowest.charAt(0))
+	const lowNote = notes.findIndex(enharmonics => enharmonics.includes(lowest.charAt(0)))
 	const highOctave = parseInt(highest.charAt(1)) * 12
-	const highNote = notes.indexOf(highest.charAt(0))
+	const highNote = notes.findIndex(enharmonics => enharmonics.includes(highest.charAt(0)))
 
 	const lowPitch = lowOctave + lowNote
 	const highPitch = highOctave + highNote
@@ -41,7 +54,7 @@ generateNoteButton.addEventListener('click', () => {
 	const randomPitchOctave = Math.floor(randomPitch / 12)
 	const randomPitchNote = randomPitch % 12
 
-	newTone = notes[randomPitchNote] + randomPitchOctave
+	newTone = notes[randomPitchNote][0] + randomPitchOctave
 	toneDisplay.innerHTML = newTone
 })