!7

import javax.sound.sampled.*;

static JPanel colorPanel;

p {
  swing {
    tt();
    colorPanel = singleColorPanelWithSize();
    showControls(jFullCenter(colorPanel));
  }
  AudioFormat format = new AudioFormat(44100, 16, 1, true, true); // signed, big-endian
  //TargetDataLine line = AudioSystem.getTargetDataLine(format);
  DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
  TargetDataLine line = (TargetDataLine) AudioSystem.getLine(info);
  line.open(format);
  
  byte[] data = new byte[256];
  short[] buf = new short[l(data)/2];
  line.start();
  
  try {
    while licensed {
      int n = line.read(data, 0, l(data));
      //printWithMSTime("Bytes: " + n);
      bytesToShorts_signedBigEndian(data, buf);
      int min = min(buf), max = max(buf);
      final double loudness = min(max(abs(min), abs(max))/32767.0, 1);
      //print("min: " + min + ", max: " + max + ", loudness: " + formatDouble(loudness, 2));
      awt {
        colorPanel.setBackground(blendColor(Color.white, Color.black, loudness));
      }
    }
  } finally {
    line.close();
  }
}

Began life as a copy of #1007999