Генератор звукового сигнала

private AudioTrack generateTone(double freqHz, int durationMs)
    {
        int sampleRate = 48000;  // 44100 Hz
 
        int count = (int)( sampleRate * 2.0 * (durationMs / 1000.0)) & ~1;
        short[] samples = new short[count];
 
        for(int i = 0; i < count; i += 2){
            short sample = (short)(Math.sin(2 * Math.PI * i / (sampleRate / freqHz)) * 0x7FFF);
            samples[i + 0] = sample;
            samples[i + 1] = sample;
        }
 
        AudioTrack track = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,
                AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_16BIT,
                count * (Short.SIZE / 8), AudioTrack.MODE_STATIC);
 
        track.write(samples, 0, count);
 
        return track;
    }

samples[i + 0] = sample;
samples[i + 1] = sample;

AudioTrack track = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,
                AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT,
                count * (Short.SIZE / 8), AudioTrack.MODE_STATIC);

saveWav(AudioTrack at)

 AudioTrack at = generateTone(тут double переменная, тут int);
 at.play();

class beeper {
public static short[] sample;
public static AudioTrack audioTrack;
public static void createAudioTrack() {
if(audioTrack==null) {
audioTrack=new AudioTrack(AudioManager.STREAM_MUSIC,48000, AudioFormat.CHANNEL_OUT_STEREO,AudioFormat.ENCODING_PCM_16BIT,sample.length*(Short.SIZE / 8), AudioTrack.MODE_STREAM,AudioTrack.STATE_INITIALIZED);
if(Build.VERSION.SDK_INT<21 ) audioTrack.setStereoVolume(AudioTrack.getMaxVolume(),AudioTrack.getMaxVolume()); else audioTrack.setVolume(AudioTrack.getMaxVolume());
}
}
private static short getSquareSignalPerTact(int tact ,double freqHz,double mPhase) {
// Используется для генерации звука с помощью прямоугольной волны,но я не использую этот метод,из-за проблемы,о которой я писал выше.
return Math.sin(mPhase+(2 * Math.PI * tact / (((double) 48000)/ freqHz))) < 0 ? Short.MIN_VALUE : Short.MAX_VALUE;
}
static void sound(double frequency,double durationMs) {
sample = new short[(int)(2*48000*durationMs/1000)];
for (int i = 0; i < sample.length; i+=2) {
sample[i] = (short) (Math.sin(2* Math.PI * i / (48000/frequency))*0x7FFF);
sample[i+1] = (short) (Math.sin(2* Math.PI * i / (48000/frequency))*0x7FFF);
}
createAudioTrack();
audioTrack.play();
audioTrack.write(sample, 0, sample.length);
}
public static void audioTrackdestroy() {
    if (audioTrack != null) {
audioTrack.stop();
audioTrack.flush();
audioTrack.release();
audioTrack = null;
}
}
}

public void button0 (View view) {
try {
a=Double.valueOf(edit1.getText().toString());
b=Double.valueOf(edit2.getText().toString());
canbuildfunction=true;
}
catch (NumberFormatException e) {
canbuildfunction =false;
show(getString(R.string.NumberFormatException));
}
if(canbuildfunction) {
if(a<b) steppchange=0.1; else if(a>b) steppchange=-0.1; else steppchange =0;
thread=new Thread(new Runnable() {
@Override
public void run() {
while((a<b && steppchange>0) || (a>b &&steppchange<0)) {
build=true;
a=new BigDecimal(a).setScale(4, BigDecimal.ROUND_HALF_DOWN).doubleValue();
result=new BigDecimal(a*a).setScale(4, BigDecimal.ROUND_HALF_DOWN).doubleValue();
if(canbuildfunction && result>=0) beeper.sound(result+100,200); else if(canbuildfunction &&result<0) beeper.sound(result-100,200);
show(getString(R.string.x)+a+","+getString(R.string.y)+result);
a+=steppchange;
}
}
});
}
}