diff --git a/demo/index.html b/demo/index.html
index 81913b5..01c0854 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -94,7 +94,8 @@ <h2>Need help or have an idea to make QH better?</h2>
                     blackNotesColour: '#000',
                     borderColour: '#000',
                     activeColour: 'yellow',
-                    octaves: 2
+                    octaves: 2,
+                    musicalTyping: false
                 },
                 keyboard = new QwertyHancock(settings);
 
@@ -115,18 +116,18 @@ <h2>Need help or have an idea to make QH better?</h2>
             };
 
             keyboard.keyUp = function (note, frequency) {
-                var new_nodes = [];
+                const newNodes = [];
 
                 for (var i = 0; i < nodes.length; i++) {
                     if (Math.round(nodes[i].frequency.value) === Math.round(frequency)) {
                         nodes[i].stop(0);
                         nodes[i].disconnect();
                     } else {
-                        new_nodes.push(nodes[i]);
+                        newNodes.push(nodes[i]);
                     }
                 }
 
-                nodes = new_nodes;
+                nodes = newNodes;
             };
 
             keyboard = new QwertyHancock(settings);
diff --git a/dist/qwerty-hancock.js b/dist/qwerty-hancock.js
index 8b5c6e8..d87690c 100644
--- a/dist/qwerty-hancock.js
+++ b/dist/qwerty-hancock.js
@@ -1,5 +1,5 @@
 /*
- * Qwerty Hancock keyboard library v0.8.0
+ * Qwerty Hancock keyboard library v0.9.0
  * The web keyboard for now people.
  * Copyright 2012-20, Stuart Memo
  *
@@ -15,7 +15,7 @@
      * In node context (browserify), `this` is the node global.
      */
     var globalWindow = typeof global === 'undefined' ? root : root.window;
-    var version = '0.8.0',
+    var version = '0.9.0',
         settings = {},
         mouse_is_down = false,
         keysDown = {},
@@ -74,7 +74,8 @@
             blackKeyColour: user_settings.blackKeyColour || '#000',
             activeColour:   user_settings.activeColour || 'yellow',
             borderColour:   user_settings.borderColour || '#000',
-            keyboardLayout: user_settings.keyboardLayout || 'en'
+            keyboardLayout: user_settings.keyboardLayout || 'en',
+            musicalTyping:  user_settings.musicalTyping === false ? false : true
         };
 
         container = document.getElementById(settings.id);
@@ -494,25 +495,27 @@
     var addListeners = function (keyboard_element) {
         var that = this;
 
-        // Key is pressed down on keyboard.
-        globalWindow.addEventListener('keydown', function (key) {
-            if (isModifierKey(key)) {
-              return;
-            }
-            if (keyboardDown(key, that.keyDown)) {
-                key.preventDefault();
-            }
-        });
+        if (settings.musicalTyping) {
+            // Key is pressed down on keyboard.
+            globalWindow.addEventListener('keydown', function (key) {
+                if (isModifierKey(key)) {
+                return;
+                }
+                if (keyboardDown(key, that.keyDown)) {
+                    key.preventDefault();
+                }
+            });
 
-        // Key is released on keyboard.
-        globalWindow.addEventListener('keyup', function (key) {
-            if (isModifierKey(key)) {
-              return;
-            }
-            if (keyboardUp(key, that.keyUp)) {
-                key.preventDefault();
-            }
-        });
+            // Key is released on keyboard.
+            globalWindow.addEventListener('keyup', function (key) {
+                if (isModifierKey(key)) {
+                return;
+                }
+                if (keyboardUp(key, that.keyUp)) {
+                    key.preventDefault();
+                }
+            });
+        }
 
         // Mouse is clicked down on keyboard element.
         keyboard_element.addEventListener('mousedown', function (event) {
diff --git a/dist/qwerty-hancock.min.js b/dist/qwerty-hancock.min.js
index b292fc8..b735531 100644
--- a/dist/qwerty-hancock.min.js
+++ b/dist/qwerty-hancock.min.js
@@ -1,2 +1,3 @@
-/* Qwerty Hancock 0.8.0 (c) 2012-20 Stuart Memo */
-!function(){var a=this,b="undefined"==typeof global?a:a.window,c="0.8.0",d={},e=!1,f={},g={65:"Cl",87:"C#l",83:"Dl",69:"D#l",68:"El",70:"Fl",84:"F#l",71:"Gl",89:"G#l",90:"G#l",72:"Al",85:"A#l",74:"Bl",75:"Cu",79:"C#u",76:"Du",80:"D#u",59:"Eu",186:"Eu",222:"Fu",221:"F#u",220:"Gu"},h=function(a){return Math.floor((d.width-a)/a)},i=function(a){var b;user_settings=a||{},d={id:user_settings.id||"keyboard",octaves:user_settings.octaves||3,width:user_settings.width,height:user_settings.height,margin:user_settings.margin||0,startNote:user_settings.startNote||"A3",whiteKeyColour:user_settings.whiteKeyColour||"#fff",blackKeyColour:user_settings.blackKeyColour||"#000",activeColour:user_settings.activeColour||"yellow",borderColour:user_settings.borderColour||"#000",keyboardLayout:user_settings.keyboardLayout||"en"},b=document.getElementById(d.id),"undefined"==typeof d.width&&(d.width=b.offsetWidth),"undefined"==typeof d.height&&(d.height=b.offsetHeight),d.startOctave=parseInt(d.startNote.charAt(1),10),d.keyOctave=user_settings.keyOctave||d.startOctave,this.setKeyOctave=function(a){return d.keyOctave=a,d.keyOctave},this.getKeyOctave=function(){return d.keyOctave},this.keyOctaveUp=function(){return d.keyOctave++,d.keyOctave},this.keyOctaveDown=function(){return d.keyOctave--,d.keyOctave},this.getKeyMap=function(){return g},this.setKeyMap=function(a){return g=a},A(),F.call(this,b)},j=function(a){var b,c,d=["A","A#","B","C","C#","D","D#","E","F","F#","G","G#"];return c=3===a.length?a.charAt(2):a.charAt(1),b=d.indexOf(a.slice(0,-1)),b=3>b?b+12+12*(c-1)+1:b+12*(c-1)+1,440*Math.pow(2,(b-49)/12)},k=function(a){(null!==a||void 0===typeof a)&&(a.style.backgroundColor=d.activeColour)},l=function(a){null!==a&&("white"===a.getAttribute("data-note-type")?a.style.backgroundColor=d.whiteKeyColour:a.style.backgroundColor=d.blackKeyColour)},m=function(a){var b,c=0,e=a.length,f=[];for(b=0;e>b;b++)if(d.startNote.charAt(0)===a[b]){c=b;break}for(b=0;e>b;b++)b+c>e-1?f[b]=a[b+c-e]:f[b]=a[b+c];return f},n=function(a){a.el.style.backgroundColor=d.whiteKeyColour,a.el.style.border="1px solid "+d.borderColour,a.el.style.borderRight=0,a.el.style.height=d.height+"px",a.el.style.width=a.width+"px",a.el.style.borderRadius="0 0 5px 5px",a.el.style.position="relative",a.el.style.zIndex="1",a.noteNumber===w()-1&&(a.el.style.border="1px solid "+d.borderColour)},o=function(a){var b=h(w()),c=Math.floor(b/2);a.el.style.backgroundColor=d.blackKeyColour,a.el.style.border="1px solid "+d.borderColour,a.el.style.position="absolute",a.el.style.left=Math.floor((b+1)*(a.noteNumber+1)-c/2)+"px",a.el.style.width=c+"px",a.el.style.height=d.height/1.5+"px",a.el.style.borderRadius="0 0 3px 3px",a.el.style.zIndex="2"},p=function(a){a.el.style.display="inline-block",a.el.style["-webkit-user-select"]="none","white"===a.colour?n(a):o(a)},q=function(a){var b=function(a){a.style.cursor="default",a.style.fontSize="0px",a.style.height=d.height+"px",a.style.padding=0,a.style.position="relative",a.style.listStyle="none",a.style.margin=d.margin,a.style["-webkit-user-select"]="none",a.style.boxSizing="content-box"};b(a.container),b(a.el),a.el.style.width=a.totalWhiteKeys*(h(a.totalWhiteKeys)+1)+2+"px"},r=function(a,b){"li"==a.tagName.toLowerCase()&&(e=!0,k(a),b(a.title,j(a.title)))},s=function(a,b){"li"==a.tagName.toLowerCase()&&(e=!1,l(a),b(a.title,j(a.title)))},t=function(a,b){e&&(k(a),b(a.title,j(a.title)))},u=function(a,b){e&&(l(a),b(a.title,j(a.title)))},v=function(a){return a.el=document.createElement("li"),a.el.id=a.id,a.el.title=a.id,a.el.setAttribute("data-note-type",a.colour),p(a),a},w=function(){return 7*d.octaves},x=function(){var a,b,c=this,e=[],f=0,g=d.startOctave,i=w();for(a=0;i>a;a++)a%this.whiteNotes.length===0&&(f=0),bizarre_note_counter=this.whiteNotes[f],"C"===bizarre_note_counter&&0!==a&&g++,b=v({colour:"white",octave:g,width:h(i),id:this.whiteNotes[f]+g,noteNumber:a}),e.push(b.el),a!==i-1&&this.notesWithSharps.forEach(function(d,j){d===c.whiteNotes[f]&&(b=v({colour:"black",octave:g,width:h(i)/2,id:c.whiteNotes[f]+"#"+g,noteNumber:a}),e.push(b.el))}),f++;return{keys:e,totalWhiteKeys:i}},y=function(a){a.keys.forEach(function(b){a.el.appendChild(b)})},z=function(a){d.keyPressOffset="C"===a[0]?0:1},A=function(){var a={container:document.getElementById(d.id),el:document.createElement("ul"),whiteNotes:m(["C","D","E","F","G","A","B"]),notesWithSharps:m(["C","D","F","G","A"])},b=x.call(a);return a.keys=b.keys,a.totalWhiteKeys=b.totalWhiteKeys,z(a.whiteNotes),q(a),y(a),a.container.querySelector("ul")?a.container.replaceChild(a.el,a.container.querySelector("ul")):a.container.appendChild(a.el),a},B=function(a){return g[a].replace("l",parseInt(d.keyOctave,10)+d.keyPressOffset).replace("u",(parseInt(d.keyOctave,10)+d.keyPressOffset+1).toString())},C=function(a,b){var c;return a.keyCode in f?!1:(f[a.keyCode]=!0,"undefined"!=typeof g[a.keyCode]?(c=B(a.keyCode),b(c,j(c)),k(document.getElementById(c)),!0):!1)},D=function(a,b){var c;return delete f[a.keyCode],"undefined"!=typeof g[a.keyCode]?(c=B(a.keyCode),b(c,j(c)),l(document.getElementById(c)),!0):!1},E=function(a){return a.ctrlKey||a.metaKey||a.altKey},F=function(a){var c=this;b.addEventListener("keydown",function(a){E(a)||C(a,c.keyDown)&&a.preventDefault()}),b.addEventListener("keyup",function(a){E(a)||D(a,c.keyUp)&&a.preventDefault()}),a.addEventListener("mousedown",function(a){r(a.target,c.keyDown)}),a.addEventListener("mouseup",function(a){s(a.target,c.keyUp)}),a.addEventListener("mouseover",function(a){t(a.target,c.keyDown)}),a.addEventListener("mouseout",function(a){u(a.target,c.keyUp)}),"ontouchstart"in document.documentElement&&(a.addEventListener("touchstart",function(a){r(a.target,c.keyDown)}),a.addEventListener("touchend",function(a){s(a.target,c.keyUp)}),a.addEventListener("touchleave",function(a){u(a.target,c.keyUp)}),a.addEventListener("touchcancel",function(a){u(a.target,c.keyUp)}))},G=function(a){this.version=c,this.keyDown=function(){},this.keyUp=function(){},this.setKeyOctave=function(a){},this.getKeyOctave=function(){},this.keyOctaveUp=function(){},this.keyOctaveDown=function(){},this.getKeyMap=function(){},this.setKeyMap=function(a){},i.call(this,a)};"undefined"!=typeof exports?("undefined"!=typeof module&&module.exports&&(exports=module.exports=G),exports.QwertyHancock=G):a.QwertyHancock=G}(this);
\ No newline at end of file
+/* Qwerty Hancock 0.9.0 (c) 2012-20 Stuart Memo */
+
+!function(){function a(e){return Math.floor((g.width-e)/e)}function i(e){var t=3===e.length?e.charAt(2):e.charAt(1);return e=(e=["A","A#","B","C","C#","D","D#","E","F","F#","G","G#"].indexOf(e.slice(0,-1)))<3?e+12+12*(t-1)+1:e+12*(t-1)+1,440*Math.pow(2,(e-49)/12)}function r(e){null!==e&&(e.style.backgroundColor=g.activeColour)}function s(e){null!==e&&("white"===e.getAttribute("data-note-type")?e.style.backgroundColor=g.whiteKeyColour:e.style.backgroundColor=g.blackKeyColour)}function n(e){for(var t=0,o=e.length,n=[],i=0;i<o;i++)if(g.startNote.charAt(0)===e[i]){t=i;break}for(i=0;i<o;i++)n[i]=o-1<i+t?e[i+t-o]:e[i+t];return n}function t(e){var t,o;e.el.style.display="inline-block",e.el.style["-webkit-user-select"]="none","white"===e.colour?((o=e).el.style.backgroundColor=g.whiteKeyColour,o.el.style.border="1px solid "+g.borderColour,o.el.style.borderRight=0,o.el.style.height=g.height+"px",o.el.style.width=o.width+"px",o.el.style.borderRadius="0 0 5px 5px",o.el.style.position="relative",o.el.style.zIndex="1",o.noteNumber===C()-1&&(o.el.style.border="1px solid "+g.borderColour)):(t=e,o=a(C()),e=Math.floor(o/2),t.el.style.backgroundColor=g.blackKeyColour,t.el.style.border="1px solid "+g.borderColour,t.el.style.position="absolute",t.el.style.left=Math.floor((o+1)*(t.noteNumber+1)-e/2)+"px",t.el.style.width=e+"px",t.el.style.height=g.height/1.5+"px",t.el.style.borderRadius="0 0 3px 3px",t.el.style.zIndex="2")}function l(e){function t(e){e.style.cursor="default",e.style.fontSize="0px",e.style.height=g.height+"px",e.style.padding=0,e.style.position="relative",e.style.listStyle="none",e.style.margin=g.margin,e.style["-webkit-user-select"]="none",e.style.boxSizing="content-box"}t(e.container),t(e.el),e.el.style.width=e.totalWhiteKeys*(a(e.totalWhiteKeys)+1)+2+"px"}function o(e,t){"li"==e.tagName.toLowerCase()&&(k=!0,r(e),t(e.title,i(e.title)))}function u(e,t){"li"==e.tagName.toLowerCase()&&(k=!1,s(e),t(e.title,i(e.title)))}function c(e,t){k&&(s(e),t(e.title,i(e.title)))}function y(e){return e.el=document.createElement("li"),e.el.id=e.id,e.el.title=e.id,e.el.setAttribute("data-note-type",e.colour),t(e),e}function d(e){return w[e].replace("l",parseInt(g.keyOctave,10)+g.keyPressOffset).replace("u",(parseInt(g.keyOctave,10)+g.keyPressOffset+1).toString())}function h(e){return e.ctrlKey||e.metaKey||e.altKey}function e(e){this.version="0.9.0",this.keyDown=function(){},this.keyUp=function(){},this.setKeyOctave=function(e){},this.getKeyOctave=function(){},this.keyOctaveUp=function(){},this.keyOctaveDown=function(){},this.getKeyMap=function(){},this.setKeyMap=function(e){},function(e){user_settings=e||{},g={id:user_settings.id||"keyboard",octaves:user_settings.octaves||3,width:user_settings.width,height:user_settings.height,margin:user_settings.margin||0,startNote:user_settings.startNote||"A3",whiteKeyColour:user_settings.whiteKeyColour||"#fff",blackKeyColour:user_settings.blackKeyColour||"#000",activeColour:user_settings.activeColour||"yellow",borderColour:user_settings.borderColour||"#000",keyboardLayout:user_settings.keyboardLayout||"en",musicalTyping:!1!==user_settings.musicalTyping},e=document.getElementById(g.id),void 0===g.width&&(g.width=e.offsetWidth),void 0===g.height&&(g.height=e.offsetHeight),g.startOctave=parseInt(g.startNote.charAt(1),10),g.keyOctave=user_settings.keyOctave||g.startOctave,this.setKeyOctave=function(e){return g.keyOctave=e,g.keyOctave},this.getKeyOctave=function(){return g.keyOctave},this.keyOctaveUp=function(){return g.keyOctave++,g.keyOctave},this.keyOctaveDown=function(){return g.keyOctave--,g.keyOctave},this.getKeyMap=function(){return w},this.setKeyMap=function(e){return w=e},b(),m.call(this,e)}.call(this,e)}var f=this,p="undefined"==typeof global?f:f.window,g={},k=!1,v={},w={65:"Cl",87:"C#l",83:"Dl",69:"D#l",68:"El",70:"Fl",84:"F#l",71:"Gl",89:"G#l",90:"G#l",72:"Al",85:"A#l",74:"Bl",75:"Cu",79:"C#u",76:"Du",80:"D#u",59:"Eu",186:"Eu",222:"Fu",221:"F#u",220:"Gu"},C=function(){return 7*g.octaves},b=function(){var t,e={container:document.getElementById(g.id),el:document.createElement("ul"),whiteNotes:n(["C","D","E","F","G","A","B"]),notesWithSharps:n(["C","D","F","G","A"])},o=function(){for(var o,n=this,i=[],r=0,s=g.startOctave,l=C(),u=0;u<l;u++)u%this.whiteNotes.length==0&&(r=0),bizarre_note_counter=this.whiteNotes[r],"C"===bizarre_note_counter&&0!==u&&s++,o=y({colour:"white",octave:s,width:a(l),id:this.whiteNotes[r]+s,noteNumber:u}),i.push(o.el),u!==l-1&&this.notesWithSharps.forEach(function(e,t){e===n.whiteNotes[r]&&(o=y({colour:"black",octave:s,width:a(l)/2,id:n.whiteNotes[r]+"#"+s,noteNumber:u}),i.push(o.el))}),r++;return{keys:i,totalWhiteKeys:l}}.call(e);return e.keys=o.keys,e.totalWhiteKeys=o.totalWhiteKeys,o=e.whiteNotes,g.keyPressOffset="C"===o[0]?0:1,l(e),(t=e).keys.forEach(function(e){t.el.appendChild(e)}),e.container.querySelector("ul")?e.container.replaceChild(e.el,e.container.querySelector("ul")):e.container.appendChild(e.el),e},m=function(e){var n=this;g.musicalTyping&&(p.addEventListener("keydown",function(e){var t,o;h(e)||(t=e,o=n.keyDown,t.keyCode in v||(v[t.keyCode]=!0,void 0===w[t.keyCode]||(o(t=d(t.keyCode),i(t)),r(document.getElementById(t)),0))||e.preventDefault())}),p.addEventListener("keyup",function(e){var t,o;h(e)||(t=e,o=n.keyUp,delete v[t.keyCode],void 0===w[t.keyCode]||(o(t=d(t.keyCode),i(t)),s(document.getElementById(t)),0)||e.preventDefault())})),e.addEventListener("mousedown",function(e){o(e.target,n.keyDown)}),e.addEventListener("mouseup",function(e){u(e.target,n.keyUp)}),e.addEventListener("mouseover",function(e){var t;t=e.target,e=n.keyDown,k&&(r(t),e(t.title,i(t.title)))}),e.addEventListener("mouseout",function(e){c(e.target,n.keyUp)}),"ontouchstart"in document.documentElement&&(e.addEventListener("touchstart",function(e){o(e.target,n.keyDown)}),e.addEventListener("touchend",function(e){u(e.target,n.keyUp)}),e.addEventListener("touchleave",function(e){c(e.target,n.keyUp)}),e.addEventListener("touchcancel",function(e){c(e.target,n.keyUp)}))};"undefined"!=typeof exports?("undefined"!=typeof module&&module.exports&&(exports=module.exports=e),exports.QwertyHancock=e):f.QwertyHancock=e}();
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..afbc0e2
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,4541 @@
+{
+  "name": "qwerty-hancock",
+  "version": "0.9.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "abab": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.5.tgz",
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+      "dev": true
+    },
+    "abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
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+      "dev": true
+    },
+    "accepts": {
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+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "dev": true,
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
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+    },
+    "acorn-walk": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.2.0.tgz",
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+      "dev": true
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+      "dev": true,
+      "requires": {
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+        "fast-json-stable-stringify": "^2.0.0",
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+      "dev": true,
+      "requires": {
+        "color-convert": "^1.9.0"
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+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.1.tgz",
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+      "dev": true,
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+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
+      "dev": true
+    },
+    "xmlhttprequest-ssl": {
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
+      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=",
+      "dev": true
+    },
+    "y18n": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+      "dev": true
+    },
+    "yargs": {
+      "version": "15.4.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
+      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
+      "dev": true,
+      "requires": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.2"
+      }
+    },
+    "yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
+    },
+    "yauzl": {
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
+      "dev": true,
+      "requires": {
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
+      }
+    },
+    "yeast": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
+      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk=",
+      "dev": true
+    }
+  }
+}
diff --git a/package.json b/package.json
index f1f0ae3..d9a329a 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "name": "qwerty-hancock",
   "title": "Qwerty Hancock",
   "description": "An interactive HTML plugin-free keyboard for your web audio project.",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "main": "dist/qwerty-hancock.js",
   "repository": {
     "type": "git",
@@ -11,19 +11,19 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "grunt": "~0.4.5",
-    "grunt-contrib-copy": "^0.5.0",
+    "grunt": "~1.3.0",
+    "grunt-contrib-copy": "^1.0.0",
     "grunt-contrib-uglify": "latest",
     "grunt-jasmine-node": "^0.3.1",
-    "grunt-karma": "~0.8.3",
-    "jsdom": "^3.x.x",
-    "karma": "~0.12.16",
-    "karma-chrome-launcher": "~0.1.4",
-    "karma-firefox-launcher": "~0.1.3",
-    "karma-jasmine": "~0.2.2",
-    "karma-opera-launcher": "~0.1.0",
-    "karma-phantomjs-launcher": "~0.1.4",
-    "karma-safari-launcher": "~0.1.1"
+    "grunt-karma": "~4.0.0",
+    "jsdom": "^16.x.x",
+    "karma": "~5.2.3",
+    "karma-chrome-launcher": "~3.1.0",
+    "karma-firefox-launcher": "~2.1.0",
+    "karma-jasmine": "~4.0.1",
+    "karma-opera-launcher": "~1.0.0",
+    "karma-phantomjs-launcher": "~1.0.4",
+    "karma-safari-launcher": "~1.0.0"
   },
   "scripts": {
     "test": "./node_modules/karma/bin/karma start ./karma-conf.js --browsers Firefox --single-run"
diff --git a/src/qwerty-hancock.js b/src/qwerty-hancock.js
index 8b5c6e8..d87690c 100644
--- a/src/qwerty-hancock.js
+++ b/src/qwerty-hancock.js
@@ -1,5 +1,5 @@
 /*
- * Qwerty Hancock keyboard library v0.8.0
+ * Qwerty Hancock keyboard library v0.9.0
  * The web keyboard for now people.
  * Copyright 2012-20, Stuart Memo
  *
@@ -15,7 +15,7 @@
      * In node context (browserify), `this` is the node global.
      */
     var globalWindow = typeof global === 'undefined' ? root : root.window;
-    var version = '0.8.0',
+    var version = '0.9.0',
         settings = {},
         mouse_is_down = false,
         keysDown = {},
@@ -74,7 +74,8 @@
             blackKeyColour: user_settings.blackKeyColour || '#000',
             activeColour:   user_settings.activeColour || 'yellow',
             borderColour:   user_settings.borderColour || '#000',
-            keyboardLayout: user_settings.keyboardLayout || 'en'
+            keyboardLayout: user_settings.keyboardLayout || 'en',
+            musicalTyping:  user_settings.musicalTyping === false ? false : true
         };
 
         container = document.getElementById(settings.id);
@@ -494,25 +495,27 @@
     var addListeners = function (keyboard_element) {
         var that = this;
 
-        // Key is pressed down on keyboard.
-        globalWindow.addEventListener('keydown', function (key) {
-            if (isModifierKey(key)) {
-              return;
-            }
-            if (keyboardDown(key, that.keyDown)) {
-                key.preventDefault();
-            }
-        });
+        if (settings.musicalTyping) {
+            // Key is pressed down on keyboard.
+            globalWindow.addEventListener('keydown', function (key) {
+                if (isModifierKey(key)) {
+                return;
+                }
+                if (keyboardDown(key, that.keyDown)) {
+                    key.preventDefault();
+                }
+            });
 
-        // Key is released on keyboard.
-        globalWindow.addEventListener('keyup', function (key) {
-            if (isModifierKey(key)) {
-              return;
-            }
-            if (keyboardUp(key, that.keyUp)) {
-                key.preventDefault();
-            }
-        });
+            // Key is released on keyboard.
+            globalWindow.addEventListener('keyup', function (key) {
+                if (isModifierKey(key)) {
+                return;
+                }
+                if (keyboardUp(key, that.keyUp)) {
+                    key.preventDefault();
+                }
+            });
+        }
 
         // Mouse is clicked down on keyboard element.
         keyboard_element.addEventListener('mousedown', function (event) {