JAVA Sinewave로 소리 재생하기

사인웨이브 만들기

 

public static byte[] getSineWaveByte(int hz, float sampleRate, int volume){
  int period = (int) (sampleRate/hz);
  System.out.println(period);
  byte[] b = new byte[(int) (period)];
  for (int i=0; i < period; i++) {
   double angle = i / (sampleRate/hz) * 2.0 * Math.PI;
   b[i] = (byte)(Math.sin(angle) * 127.0 * volume);
  }
  return b;
 }

 

재생하기

public static void playbyte(byte[] bytes) throws LineUnavailableException
 {
  byte[] buf = new byte[1];
  AudioFormat af =
    new AudioFormat(
      SAMPLE_RATE, // sampleRate
      8,           // sampleSizeInBits
      1,           // channels
      true,        // signed
      false);      // bigEndian
  SourceDataLine sdl = AudioSystem.getSourceDataLine(af);
  sdl.open(af);
  sdl.start();
  while(true){
   sdl.write(bytes,0,bytes.length);
  }
 }