https://github.com/gasman/jasmid

UNMAINTAINED. A MIDI file reader and synthesiser in Javascript
https://github.com/gasman/jasmid

Last synced: 10 days ago
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UNMAINTAINED. A MIDI file reader and synthesiser in Javascript

• Host: GitHub
• URL: https://github.com/gasman/jasmid
• Owner: gasman
• License: other
• Created: 2010-11-14T09:05:35.000Z (almost 14 years ago)
• Default Branch: master
• Last Pushed: 2022-07-27T15:02:53.000Z (over 2 years ago)
• Last Synced: 2024-10-14T10:29:47.318Z (29 days ago)
• Language: JavaScript
• Homepage: http://matt.west.co.tt/music/jasmid-midi-synthesis-with-javascript-and-html5-audio/
• Size: 126 KB
• Stars: 416
• Watchers: 19
• Forks: 89
• Open Issues: 14
• Metadata Files:
  • Readme: README
  • License: LICENSE

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README

        
THIS PROJECT IS NO LONGER MAINTAINED. http://unmaintained.tech/

===============================================================

see jasmid.ts fork: https://github.com/pravdomil/jasmid.ts

jasmid - A Javascript MIDI file reader and synthesiser

Originally presented at BarCamp London 8, 13-14 November 2010

Instructions:

Open index.html in browser. Turn up volume. Click on link.

Sound output is via one of the following mechanisms, according to what your

browser supports:

* Mozilla Audio Data API 

* Web Audio API

    

* a Flash fallback originally taken from dynamicaudio.js by Ben Firshman

     and hacked around by me.

The code:

stream.js - helper library for reading a string as a stream of typed data

midifile.js - parses the MIDI file format into a header and a list of tracks,

    each consisting of a list of event objects

replayer.js - steps over the data structure generated by midifile.js and calls

    the appropriate operations on the synthesiser

synth.js - audio synthesiser; generates waveforms according to tweakable

    parameters

audio.js - passes the generated waveform to either the Audio Data API or the

    Flash fallback widget (da.swf)

Limitations:

* The only event types supported by replayer.js are note on, note off, tempo

    change and program change

* There are currently only two instrument presets defined in synth.js - one for

    strings and a 'piano' one for everything else - and neither of them are

    particularly good (just a single volume-modulated sine wave).

Matt Westcott  - @gasmanic - http://matt.west.co.tt/