fork download
copy 
  1.  
  2.  
  3. import java.util.Arrays;
  4.  
  5. import javax.sound.sampled.AudioFormat;
  6. import javax.sound.sampled.AudioSystem;
  7. import javax.sound.sampled.LineUnavailableException;
  8. import javax.sound.sampled.SourceDataLine;
  9.  
  10.  
  11. public class Main {
  12.  
  13.  
  14. 	public static void main(String[] args) throws LineUnavailableException {
  15.  
  16. 		Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
  17.  
  18. 		// サンプリングレート: 44100 Hz
  19. 		int sampleRate = 44100;
  20.  
  21. 		// ラ(A3): 220 Hz
  22. 		int frequency = 220;
  23.  
  24. 		int l = sampleRate / frequency;
  25. 		int c = l / 2;
  26. 		int v = 0x07;
  27.  
  28. 		// １波長分の矩形波データ
  29. 		byte[] b = new byte[l];
  30. 		Arrays.fill(b, 0, c, (byte) +v);
  31. 		Arrays.fill(b, c, l, (byte) -v);
  32.  
  33. 		// PCM_SIGNED 44100.0 Hz, 8 bit, mono, 1 bytes/frame
  34. 		AudioFormat f = new AudioFormat(sampleRate, 8, 1, true, true);
  35.  
  36. 		try(SourceDataLine line = AudioSystem.getSourceDataLine(f)) {
  37.  
  38. 			long startTime = System.currentTimeMillis();
  39.  
  40. 			// １０ミリ秒分のバッファを用意する
  41. 			line.open(f, sampleRate * 10 / 1000);
  42. 			line.start();
  43.  
  44. 			while (true) {
  45.  
  46. 				// １波長分出力
  47. 				line.write(b, 0, b.length);
  48.  
  49. 				// おおよそ２秒間鳴らしたら終了
  50. 				long time = System.currentTimeMillis();
  51. 				if (time > startTime + 2000L) {
  52. 					break;
  53. 				}
  54. 			}
  55.  
  56. 			line.drain();
  57. 			line.stop();
  58. 		}
  59. 	}
  60. }
  61.  
Not running #stdin #stdout 0s 0KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/s8LmWy
language:
Text (text 6.10)
created:
2 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!