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https://github.com/notthetup/midimessage
Simple Web-MIDI Message Parser
https://github.com/notthetup/midimessage
Last synced: about 2 months ago
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Simple Web-MIDI Message Parser
- Host: GitHub
- URL: https://github.com/notthetup/midimessage
- Owner: notthetup
- License: mit
- Created: 2015-08-18T08:34:41.000Z (about 9 years ago)
- Default Branch: gh-pages
- Last Pushed: 2022-03-05T08:11:48.000Z (over 2 years ago)
- Last Synced: 2024-07-12T22:53:41.662Z (2 months ago)
- Language: JavaScript
- Homepage: http://notthetup.github.io/midimessage
- Size: 26.4 KB
- Stars: 35
- Watchers: 5
- Forks: 9
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-webaudio - midimessage - A simple MIDI Message parser. (Packages / MIDI)
README
# midimessage
[](http://badge.fury.io/js/midimessage)
Simple MIDI Message Parser for JavaScript. This parser takes in a [MIDIMessageEvent](http://webaudio.github.io/web-midi-api/#MIDIMessageEvent) and returns a plain Javascript Object with propties indicating the data in the MIDI message.
## Installation
`npm install midimessage`
## Usage
```js
var MIDIMessage = require('midimessage');
midiInput.onmidimessage = function(event){
var midiMessage = MIDIMessage(event);
console.log("Parsed", midiMessage);
}
```
## API
`MIDIMessage` : _Function_ - Takes a MIDIMessageEvent as the only argument and decodes the data in the MIDIMessageEvent. Returns a MIDIMessage Object which has various properties set to values based on the MIDIMessage.
These properties are based off the [MIDI Message Standard](http://www.midi.org/techspecs/midimessages.php) as defined in the [MIDI Spec](http://www.midi.org/techspecs/)
These are some of the properties that may be exposed (based on the incoming MIDI message) :
- `channel`: __Number__ (0-127) - MIDI Channel Number.
- `messageType`: __String__ - Type of message. Possible values defined below.
- `key`: __Number__ (0-127) - The key (note) number. Defined on -`noteon`,`noteoff`,`keypressure` messages.
- `velocity`: __Number__ (0-127) - Velocity. Defined on `noteon`,`noteoff` messages.
- `controllerNumber`: __Number__ (0-127) - Controller Number. Controller numbers 120-127 are reserved as "Channel Mode Messages".
- `controllerValue`: __Number__ (0-127) Controller Value. Has various meanings based on `controllerNumber`.
- `channelModeMessage`: __String__ - Channel Mode Message. Specific messages for Channel Modes based on `controllerNumber`. Possible values defined below.
- `pressure`: __Number__ (0-127) - Pressure value.
- `pitchBend`: __Number__ (0-16383) - Pitch Bend value. Center (no pitch change) is 8192.
Possible values of `messageType` property.
```js
[
'noteon', // Note On event.
'noteoff', // Note Off event.
'keypressure', // Polyphonic Key Pressure (Aftertouch).
'controlchange', // Control Change.
'programchange', // Program Change.
'channelpressure', // Channel Pressure (After-touch).
'pitchbendchange', // Pitch Bend Change.
]
```
Possible values of `channelModeMessage` property.
```js
[
'allsoundoff', // All Sound Off.
'resetallcontrollers', // Reset All Controllers.
'localcontroloff', // Local Control Off.
'localcontrolon', // Local Control On.
'allnotesoff', // All Notes Off.
'omnimodeoff', // Omni Mode Off.
'omnimodeon', // Omni Mode On.
'monomodeon', // Mono Mode On (Poly Off).
'polymodeon' // Poly Mode On (Mono Off)
]
```
# License
MIT
See License file