This is absolutely amazing. Are you planning to release it as open source? Does pull down menu for style mean that you are planning other styles? [imagine me jumping in excitement] :)
Thanks!! Yes, I have planned a couple more.
The code is not obfuscated, so you can have a look that them. It's heavily based on my audio-experiments which are open sourced here https://github.com/homecoded/js-synth.
I'll add the "sound of html" there, now that you mentioned it!
I'll add the "sound of html" there, now that you mentioned it!