test of webmidi

webmidi-playground.js

const WebMidi = require('webmidi')

const name = 'LPD8 MIDI 1'

WebMidi.enable((err) => {
  err && console.warn(err)

  WebMidi.inputs.forEach((input) => {
    console.info(`${input.manufacturer} '${input.name}' ${input.state}`)
  })
  WebMidi.outputs.forEach((output) => {
    console.info(`${output.manufacturer} '${output.name}' ${output.state}`)
  })

  const input = WebMidi.getInputByName(name)
  if (input) {
    input.addListener('controlchange', 'all', (e) => {
      console.log(e.data[1], e.data[2]) // channel, value
    })

    input.addListener('noteon', 'all', (e) => {
      console.log(e.data[1], e.data[2]) // channel, value
    })
  } else {
    console.warn(`no '${name}' input found`)
  }
})