SoundGenerator.java 文件源码

public static void playGradient(double fstart,double fend,double duration,double volume,byte fadeend,byte wave) {
    byte[] freqdata = new byte[(int)(duration * SAMPLE_RATE)];

    // Generate the sound
    for(int i = 0; i < freqdata.length; i++) {
        freqdata[i] = (byte)generateValue(i, duration, fstart + (fend-fstart) * (i/(double)freqdata.length), volume, fadeend, wave);
    }

    // Play it
    try {
        final AudioFormat af = new AudioFormat(SAMPLE_RATE, 8, 1, true, true);
        SourceDataLine line = AudioSystem.getSourceDataLine(af);
        line.open(af, SAMPLE_RATE);
        line.start();
        line.write(freqdata, 0, freqdata.length);
        line.drain();
        line.close();
    }catch(LineUnavailableException e) {
        e.printStackTrace();
    }
}