xen-midi

Free-pitch polyphonic MIDI I/O based on webmidi.js using multi-channel pitch-bend

Installation ##

``bash
npm i
`

Documentation ##

Documentation is hosted at the project Github pages.

To generate documentation locally run:
`bash
npm run doc
`

Example

`typescript
import {WebMidi} from 'webmidi';
import {MidiOut} from 'xen-midi';

async function play() {
await WebMidi.enable();

// Set maximum microtonal polyphony to 4 (the number of channels reserved).
const channels = new Set([1, 2, 3, 4]);
const midiOut = new MidiOut(WebMidi.outputs[1], channels);

// Play a just intonation 4:5:6 major chord.
midiOut.playNotes([
{
frequency: 440, // Frequency in Hz
rawAttack: 80, // Attack velocity from 0 to 127
rawRelease: 80, // Release velocity from 0 to 127
time: "+0", // Relative time starting from now
duration: 500, // Time is measured in ms
},
// Attack and release default to 64.
{
frequency: 550,
time: "+100",
duration: 500,
},
{
frequency: 660,
time: "+200",
duration: 500,
}
]);
}

play();
``