在p5草图上添加第二个电位计（Arduino）

Question

我创建了一个p5草图，该草图使用与Arduino连接的电位计来改变声音的频率。我有第二个电位器，想让它控制另一种声音，但是我不确定该怎么做。

有没有一种方法可以更改或添加到我的草图中，以便可以一次用2个电位器来更改声音？

var serial; // variable to hold an instance of the serialport library
var options = {
  baudRate: 9600
}; // set baudrate to 9600; must match Arduino baudrate
var inData; // for incoming serial data
var slider;


let carrier; // this is the oscillator we will hear
let modulator

let analyzer; // we'll use this visualize the waveform

// the carrier frequency pre-modulation
let carrierBaseFreq = 220;

// min/max ranges for modulator
let modMaxFreq = 112;
let modMinFreq = 0;
let modMaxDepth = 150;
let modMinDepth = -150;


let ctx, ctxOn;





// get the list of ports:
function printList(portList) {
  // portList is an array of serial port names
  for (var i = 0; i < portList.length; i++) {
    // Display the list the console:
    console.log(i + " " + portList[i]);
  }
}

var portName = '/dev/cu.usbmodem14601'; // fill in your serial port name here



function serverConnected() {
  console.log('connected to server.');
}

function portOpen() {
  console.log('the serial port opened.')
}


function serialError(err) {
  console.log('Something went wrong with the serial port. ' + err);
}

function portClose() {
  console.log('The serial port closed.');
}


function serialEvent() {
  inData = Number(serial.read());
}


function draw() {
  background(30);
  toggleAudio(inData);
  // map mouseY to modulator freq between a maximum and minimum frequency
  let modFreq = map(mouseY, height, 0, modMinFreq, modMaxFreq);
  modulator.freq(modFreq);

  // change the amplitude of the modulator
  // negative amp reverses the sawtooth waveform, and sounds percussive
  //
  let modDepth = map(mouseX, 0, width, modMinDepth, modMaxDepth);
  modulator.amp(modDepth);

  // analyze the waveform
  waveform = analyzer.waveform();

  // draw the shape of the waveform
  stroke(255);
  strokeWeight(10);
  beginShape();
  for (let i = 0; i < waveform.length; i++) {
    let x = map(i, 0, waveform.length, 0, width);
    let y = map(waveform[i], -1, 1, -height / 2, height / 2);
    vertex(x, y + height / 2);
  }
  endShape();

  strokeWeight(1);

  text("sensor value: " + inData, 30, 30);
  // add a note about what's happening
  text('Modulator Frequency: ' + modFreq.toFixed(3) + ' Hz', 20, 20);
  text(
    'Modulator Amplitude (Modulation Depth): ' + modDepth.toFixed(3),
    20,
    40
  );
  text(
    'Carrier Frequency (pre-modulation): ' + carrierBaseFreq + ' Hz',
    width / 2,
    20


  );
}

// helper function to toggle sound
function setup() {


        ctx = getAudioContext();
    ctxOn = createButton('turn on Audio');
    ctxOn.mousePressed(() => {
    ctx.resume().then(() => {
    console.log('Audio Context is now ON');
        ctxOn.hide();
    });
    });
  let cnv = createCanvas(800, 400);
  noFill();
  serial = new p5.SerialPort(); // make a new instance of the serialport library
  serial.on('data', serialEvent); // callback for when new data arrives
  serial.on('error', serialError); // callback for errors
  serial.open(portName, options); // open a serial port @ 9600 

  carrier = new p5.Oscillator('sine');
  carrier.amp(0); // set amplitude
  carrier.freq(carrierBaseFreq); // set frequency
  carrier.start(); // start oscillating

  // try changing the type to 'square', 'sine' or 'triangle'
  modulator = new p5.Oscillator('sawtooth');
  modulator.start();

  // add the modulator's output to modulate the carrier's frequency
  modulator.disconnect();
  carrier.freq(modulator);

  // create an FFT to analyze the audio
  analyzer = new p5.FFT();




}



function toggleAudio(inData) {
  inData && carrier.amp(inData/10 - 0.1, 0.01);

enter code here

  function serialEvent() {
    // inData = Number(serial.read());   // can use this when just looking for 1 byte msgs from Arduino

    // Alternatively, read a string from the serial port, looking for new line as data separator:
    var inString = serial.readStringUntil('\r\n');
    // check to see that there's actually a string there:
    if (inString.length > 0) {
      // convert it to a number:
      inData = Number(inString);
    }
  }
}

那是我的草图。任何帮助或指导都将很棒！