Android Square Wave

Question

我正在尝试制作振荡器而不是创建多个波形，但是我的方波方法产生错误，我可能会犯一些愚蠢的错误，但任何帮助都会受到赞赏。继承我的代码：

import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;

/**
* Created by Jack on 16/01/2017.
*/

public class PlayWave {

private final int SAMPLE_RATE = 44100; //maximum sample rate Audiotrack can use
private AudioTrack mAudio;
int buffsize = AudioTrack.getMinBufferSize(SAMPLE_RATE, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT);
private int sampleCount;

public PlayWave() {

    mAudio = new AudioTrack(AudioManager.STREAM_MUSIC, SAMPLE_RATE, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT,
                            buffsize, AudioTrack.MODE_STATIC);
}

public void setWave (int frequency) {

    sampleCount = (int) ((float) SAMPLE_RATE/frequency);
    short samples[] = new short[sampleCount]; //array to hold samples
    int amplitude = 32767; //
    double twoPi = 8. * Math.atan(1.); //twoPi calculated as the arctangent of 1 multiplied by 8
    double phase = 0.0;

    for (int i = 0;  i < sampleCount;  i++) {
        samples[i] = (short) (amplitude * Math.sin(phase));
        phase += twoPi * frequency/SAMPLE_RATE;
    }
    mAudio.write(samples, 0, sampleCount);
}

public void setSquareWave (int frequency) {
    sampleCount = (int) ((float) SAMPLE_RATE/frequency);
    short samples[] = new short[sampleCount];
    int amplitude = 32767;
    double phase = 0.0;
    double twoPi = 8. * Math.atan(1.);
    for (int i = 0; i < buffsize; i++) {
        short s = (amplitude * Math.sin(phase));
        if (s > 0.0) {
            samples[i] = 32767;
        };

        if (s < 0.0) {
            samples[i] = -32767;
        }
        phase += twoPi * frequency / samples; //this loop causes errors
    }
}

public void start () {
    mAudio.reloadStaticData();
    mAudio.setLoopPoints(0, sampleCount, -1);
    mAudio.play();
}

public void stop () {
    mAudio.stop();
}
}