osc.js

function receiveOsc(address, value) {
  if (address == '/EnergyVisualizer/RMS') {
    for (let i = 0; i < 426; i++) {
      rms[i] = value[i];
    }
  }
}

function sendOsc(address, value) {
  socket.emit('message', [address].concat(value));
}

function setupOsc(oscPortIn, oscPortOut) {
  var socket = io.connect('http://127.0.0.1:8081', { port: 8081, rememberTransport: false });
  socket.on('connect', function() {
    socket.emit('config', { 
      server: { port: oscPortIn,  host: '127.0.0.1'},
      client: { port: oscPortOut, host: '127.0.0.1'}
    });
  });
  socket.on('message', function(msg) {
    if (msg[0] == '#bundle') {
      for (var i=2; i<msg.length; i++) {
        receiveOsc(msg[i][0], msg[i].splice(1));
      }
    } else {
      receiveOsc(msg[0], msg.splice(1));
    }
  });
}