Task 1:

I managed to connect the cable, which took me about 1 min. FastLed has already been downloaded before the recitation. From the material, I learnt to give supply for the larger pixel boards to glow the same way.

Task 2:

I lit up accordingly, the second light in purple. To be seen in the link. 

IMG_2916

On copying the code, I produced the scene below. 

IMG_2884

Task 3:
 I tried to let all the pixels’ colors change with the sound but I can’t. And found out that it was the problem with the “constrain” function. On changing “constrain” to “map” . “map” was very useful a function that by ratio, it could turn a variable from one range to another correspondingly while “constrain” only limited a variable within the maximum and minimum. This is the situation before the change. 

IMG_2885

This is after. 

IMG_2887

It is such an ambiguity that I wanted it to be all purple and only bring changes on the saturability of purple. 

/* This is a code example for Processing, to be used on Recitation 7
  You need to have installed the SerialRecord library.
  
  Interaction Lab
  IMA NYU Shanghai
  2022 Fall
*/
import processing.sound.*;
import processing.serial.*;
import osteele.processing.SerialRecord.*;
SoundFile sample;
FFT fft;
int bands =256;
float smoothingFactor = 0.2;

Serial serialPort;
SerialRecord serialRecord;

float[] sum = new float[bands];
int scale = 8;
float barWidth;


int W;         //width of the tiles
int NUM = 255;  //amount of pixels
int[] r = new int[NUM]; //red of each tile
int[] g = new int[0]; //green of each tile
int[] b = new int[NUM]; //blue of each tile

void setup() {
  size(1024, 768);
  background(255);
  barWidth = 10*width/float(bands);
  sample = new SoundFile(this, "Post Malone - A Thousand Bad Times.mp3");
  
  // You can use this syntax and change COM3 for your serial port
  // printArray(Serial.list());
  // serialPort = new Serial(this, "COM3", 9600);
  // in MacOS it looks like "/dev/cu.usbmodem1101"
  //or you can try to use this instead:
  fft = new FFT(this, bands);
  fft.input(sample);
  String serialPortName = SerialUtils.findArduinoPort();
  serialPort = new Serial(this, serialPortName, 9600);
  
  serialRecord = new SerialRecord(this, serialPort, 4);
  serialRecord.logToCanvas(false);
  
  rectMode(CENTER);
}

void draw() {
  background(125, 255, 125);
  fill(255, 0, 150);
  noStroke();
  
  fft.analyze();
  
  //int n = floor(constrain(mouseX/W , 0, NUM-1));
  //r[n] = floor(255);
  //g[n] = floor(random(255));
  //b[n] = floor(255);
  
  for (int i = 0; i < 32; i++) {
    // Smooth the FFT spectrum data by smoothing factor
    sum[i] += (fft.spectrum[i] - sum[i]) * smoothingFactor;

    // Draw the rectangles, adjust their height using the scale factor
    rect(i*barWidth, height, barWidth, -sum[i]*height*scale);
  
 
    
      r[i] = floor(255);
      g[i] = floor(random(255));
      b[i] = floor(255);
      
      serialRecord.values[0] = i;     // which pixel we change (0-59)
      serialRecord.values[1] = r[i];  // how much red (0-255)
      serialRecord.values[2] = g[i];  // how much green (0-255)
      serialRecord.values[3] = b[i];  // how much blue (0-255)
      serialRecord.send();            // send it!
    
  }
}

void mousePressed(){//点击鼠标
 if(sample.isPlaying()){//如果声音在播放
   sample.pause();//暂停
 }else{//否则
   sample.loop();//播放声音
   //play()函数只播放声音一次
 }
}

But errors on behalf of the drive appeared. It said so:

SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
RuntimeException: Error opening serial port /dev/cu.usbmodem11301: Port busy