MIDI support in the browser.
This library allows you to both parse and generate MIDI event streams and MIDI recordings. It also allows you to connect to a MIDI instrument (such as a keyboard) via the Web MIDI API (currently only available in Chrome and, I think, Opera). For example, if you use Chrome and can plug in a MIDI keyboard you should to be able to play it using this demonstration.
To parse a MIDI string that represents a recording and thus generate a value of type Midi.Recording you can use:
(parse <<< normalise) midiString
On the other hand, you may merely need to parse MIDI events (such as note on or note off) that emenate from a Web MIDI connection. In other words, you are connecting directly to a MIDI device through the browser and need to parse the stream of event messages as the instrument is played. To do this, use:
parseMidiEvent midiEvent
This will attempt to parse an individual event.
bower install purescript-midi
See examples.