https://github.com/plus1tv/redux-webmidi
🎹 Intuitive Redux reducer/action creators for handling MIDI devices.
https://github.com/plus1tv/redux-webmidi
keyboard midi piano redux webmidi
Last synced: about 2 months ago
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🎹 Intuitive Redux reducer/action creators for handling MIDI devices.
- Host: GitHub
- URL: https://github.com/plus1tv/redux-webmidi
- Owner: plus1tv
- License: mit
- Created: 2016-09-16T16:46:41.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2023-03-14T15:26:51.000Z (about 2 years ago)
- Last Synced: 2025-03-25T23:51:28.550Z (2 months ago)
- Topics: keyboard, midi, piano, redux, webmidi
- Language: TypeScript
- Homepage:
- Size: 217 KB
- Stars: 8
- Watchers: 2
- Forks: 0
- Open Issues: 5
-
Metadata Files:
- Readme: readme.md
- License: license.md
Awesome Lists containing this project
README
![Cover Image][cover-url]
# redux-webmidi
[![Npm Package][npm-img]][npm-url]
[![License][license-img]][license-url]
[![Dependency Status][david-img]][david-url]
[![devDependency Status][david-dev-img]][david-dev-url]
An intuitive Redux reducer/action creators for handling MIDI devices.
```bash
npm i redux-webmidi -S
```
## Usage
```js
import { createStore, combineReducers } from 'redux';
import { midiReducer as midi, midiProvider } from 'redux-webmidi';
const reducer = combineReducers({
// Your other reducers
midi
});
const store = createStore(reducer);
// Wrap your store with a proxy provider
midiProvider(store);
```
```js
import { connect } from 'react-redux';
@connect((state) => ({midi: state.midi}))
let App = ({ midi }) => (
{midi.ports.map((c, i) => )}
);
```
## Data Layout
```ts
type KeyMap = {
// The index is the key on the keyboard.
[index: number]: {
// The status keycode
status: number,
velocity: number
}
};
type MidiDevice = {
id: number,
name: string,
manufacturer: string,
state: 'connected' | 'disconnected',
type: 'input' | 'output' | 'input/output',
keys: KeyMap
};
type WebMidiState = {
ports: MidiDevice[]
};
```
Refer to the official [Midi specification](https://www.midi.org/specifications/item/table-1-summary-of-midi-message) or [WebMidi](https://webaudio.github.io/web-midi-api/) specification if you have any other questions.
The first byte (denoted as zero in all examples in the table) describes the midi channel, whereas the larger byte describes the actual message.
| Message | Status |
|----------|--------|
| Note Off | `0x80` |
| Note On | `0x90` |
```js
let {keys} = this.state.port[0];
keys.map( key => {
if (key.status & 0x90) {
playSound('./bee.wav');
}
});
```
[cover-url]: docs/cover.png
[license-img]: http://img.shields.io/:license-mit-blue.svg?style=flat-square
[license-url]: https://opensource.org/licenses/MIT
[david-url]: https://david-dm.org/plus1tv/redux-webmidi
[david-img]: https://david-dm.org/plus1tv/redux-webmidi.svg?style=flat-square
[david-dev-url]: https://david-dm.org/plus1tv/redux-webmidi#info=devDependencies
[david-dev-img]: https://david-dm.org/plus1tv/redux-webmidi/dev-status.svg?style=flat-square
[travis-img]: https://img.shields.io/travis/plus1tv/redux-webmidi.svg?style=flat-square
[travis-url]:https://travis-ci.org/plus1tv/redux-webmidi
[codecov-img]:https://img.shields.io/codecov/c/github/plus1tv/redux-webmidi.svg?style=flat-square
[codecov-url]: https://codecov.io/gh/plus1tv/redux-webmidi
[npm-img]: https://img.shields.io/npm/v/redux-webmidi.svg?style=flat-square
[npm-url]: http://npm.im/redux-webmidi
[npm-download-img]: https://img.shields.io/npm/dm/redux-webmidi.svg?style=flat-square