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Web MIDI API Polyfill

This is a polyfill using the Jazz NPAPI MIDI plugin to implement the Web MIDI API on Mac and Windows.

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To use the Web MIDI API Polyfill

Just include

<script src=''></script>

in your HTML source.

Test it out!

Before you press the button: install the's Jazz-Plugin, version 1.4 or higher to enable MIDI support on Windows, OSX and Linux.

You will also want some MIDI input/output devices - MacOS and Windows typically have output software synthesizers installed by default. On MacOS, if you want a software input device you may want to install MidiKeys.