A toolbox to build interactive and smart instruments on the web and mobile.
Web example can be seen here
React Orchestra can be integrated easily into any project.
Under the hood RO uses :
react-native-sound to play mp3 sounds.
react-native-fs to cache sounds in the filesystem.
realm as an offline store for caching and state storage ( might remove this in future versions unless I or someone builds up on realm features to improve react-orchestra functionality )
In your project root :
Install it :
With npm
npm install --save react-native-sound react-native-fs realm
yarn add react-native-sound react-native-fs realm
Then link it :
react-native link
IMPORTANT READ THIS:
The sound generation and playback for the web orchestra depends on the WebAudio API. Check support for your platform target here. If your targeted platform is supported you can go ahead and install it.
With npm
npm install --save react-orchestra
yarn add react-orchestra
No need to link it ! It's plain JS.
And you're good to go 💃.
Let's start writing some instruments.
There you go :
yarn add react-orchestra || { npm i -S react-orchestra; }
yarn add react-native-sound react-native-fs realm || { npm i -S react-native-sound react-native-fs realm; }
react-native link react-native-sound react-native-fs realm
yarn add react-orchestra || { npm i -S react-orchestra; }
Let's build a couple of use-cases to get familiar with the API. Or you can directly check out and run the examples :
- Web example :
git clone [email protected]:RakanNimer/react-orchestra.git
cd react-orchestra/web/
{yarn && yarn start} || {npm i && npm start}- Native example :
git clone [email protected]:RakanNimer/react-orchestra.git
cd react-orchestra/ReactOrchestraNativeDemo/
yarn || {npm i;}
npm run init-app
react-native run-ios # or run-android1. A non-interactive instrument that can play notes and sync ui.
import React from 'react';
import { Instrument, Note } from 'react-orchestra/web';
// If you're using react-native then it's :
// import { Instrument, Note } from 'react-orchestra/native';
const delay = ms => new Promise(resolve => setTimeout(ms, resolve));
class App extends Component {
constructor(props) {
super(props);
this.state = {
playA: false,
playC: false,
};
}
componentDidMount() {
this.playMelody();
}
async playMelody() {
await delay(1000);
this.setState({ playA: true });
await delay(1000);
this.setState({ playB: true, playA: false });
await delay(1000);
this.setState({ playB: false });
}
render() {
return (
<Instrument name={'acoustic_grand_piano'} interactive={false}>
<Note name={'A3'} play={this.state.playA}>
{/*
You can put any react element here native or web.
*/}
<div> This is what I want my note to look like ! I can put anything in here.
<img
alt="Some pic"
src="https://s-media-cache-ak0.pinimg.com/originals/36/43/e7/3643e7e8dab9b88b3972ee1c9f909dea.jpg"
/>
</div>
</Note>
<Note name={'C3'} play={this.state.playC}><div>Another note</div></Note>
</Instrument>
);
}
}
export default App;The API aims to be self-explanatory, for example, in the code above we're creating two controlled note components, that we can play and stop using the play prop.
When the component mounts, we start playing a simple melody.
2. An interactive instrument that the end-user controls.
Let's build an instrument that the user can play by clicking or tapping on notes.
import React from 'react';
import { Instrument, Note } from 'react-orchestra/web';
// If you're using react-native then it's :
// import { Instrument, Note } from 'react-orchestra/native';
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
};
this.onStartPlaying.bind(this);
this.onStopPlaying.bind(this);
}
onStartPlaying(noteName) {
console.warn(`Note played ${noteName}. Use this function if you want to sync your state with the instrument, dispatch redux action or alter mobx observable or just setting state inside your component`);
}
onStopPlaying(noteName) {
console.warn(`Stopped playing ${noteName}. Use this function if you want to sync your state with the instrument, dispatch redux action or alter mobx observable or just setting state inside your component`);
}
render() {
return (
<Instrument name={'acoustic_grand_piano'} onStartPlaying={this.onStartPlaying} onStopPlaying={this.onStopPlaying} interactive>
<Note name={'A3'}>
<div>
<div>Click me to play A3</div>
</div>
</Note>
<Note name={'C3'}><div>Click me to play C3</div></Note>
</Instrument>
);
}
}
export default App;You don't need to listen to clicks or taps setting the interactive prop to true will attach the right events and clean them up for you !
The onPlay handler can be used to manage your state.
3. Playing midi and displaying playback.
As any orchestra, react-orchestra can learn and play music tracks ! For now, it understands MIDI out of the box, more input sources are in the roadmap.
Let's play Beethoven Moonlight's sonata.
import React from 'react';
import { Orchestra } from 'react-orchestra/web';
// If you're using react-native then it's :
// import { Orchestra } from 'react-orchestra/native';
const midiURL = 'https://s3-eu-west-1.amazonaws.com/ut-music-player/assets/midis/beet1track-medium-fast.mid';
class App extends Component {
constructor(props) {
super(props);
this.state = {
playSong: false,
};
this.onMidiLoaded = this.onMidiLoaded.bind(this);
this.onInstrumentsReady = this.onInstrumentsReady.bind(this);
}
componentDidMount() {
}
onMidiLoaded(parsedMidi) {
console.warn(`Midi loaded ${JSON.stringify(parsedMidi, 2, 2)}. Loading instruments now ...`);
return parsedMidi;
}
onInstrumentsReady(instruments) {
console.warn(`Instruments ${JSON.stringify(instruments, 2, 2)} are loaded into memory and ready !`);
this.setState({ play: true });
return instruments;
}
onNotePlayed(noteName) {
console.warn(`Note ${noteName} was played, optionally handle this event`);
}
render() {
return (
<Orchestra
midiURL={midiURL}
onMidiLoaded={this.onMidiLoaded}
onInstrumentsReady={this.onInstrumentsReady}
play={this.state.playSong}
selectedTracks={[0, 1]}
onNotePlayed={this.onNotePlayed}
>
<div> This is an orchestra it can play complex melodies ! </div>
</Orchestra>
);
}
}
export default App;**4. Creating a note factory **
This is useful when you want to generate notes that follow a given rule
Example : Render the C Major scale starting at the third octave over 2 octaves
import React from 'react';
import { NoteFactory } from 'react-orchestra/web';
const renderNote = (instrumentName, noteName) => <div style={{ cursor: 'pointer' }}> I am a note : {instrumentName} {noteName} You can click me ! </div>;
class NoteFactoryExample extends React.Component {
render() {
return (
<NoteFactory
type="scale"
scaleName="ionian"
noteName="C"
instrumentName="acoustic_grand_piano"
startOctave="3"
octaveCount="1"
renderNote={renderNote}
/>
);
}
}
export default NoteFactoryExample;Did you build something cool with this library ?
Show it off here by submittiing a pull request.
npm test
Tests lint all js files using the js airbnb coding style and runs the jest tests in __tests__ directory.
You can contribute by submitting, and responding to issues. If you'd like to add a new feature PRs are very welcome, but please open an issue beforehand so we can discuss the optimal way to go when adding the feature !
- Create NoteFactory component that takes in a scale name or chord name or Midi URL and creates user-rendered Notes.
- Add tests that run on browser
- Add react-orchestra/native jest tests
- Add more web jest tests
This project is licensed under the MIT License - see the LICENSE.md file for details
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