This is a project that I have been working on during a week long workshop in a course called Audio Programming at Music Communication and Technology at NTNU. The result is a keyboard-controlled waveguide-synth, where you can chose among different instruments and add effects to these. This is a work in progress, and may contain some bugs :)
wavetables taken from: https://github.com/GoogleChromeLabs/web-audio-samples/tree/gh-pages/samples/audio/wave-tables
Give it a go: http://folk.ntnu.no/jorgennv/miniProject/