Question

我正在开发使用触摸式X和Y的示例应用程序，将X等同于频率，将Y等同于振幅。然后计算简单的正弦波并传递该抛出线程。当我生成声音信号时-在写入新数据之间，再生器发出刺耳的声音。

我以前从未使用过声音，但是可以猜想裂纹是正弦波中应有的值跳跃，但是为什么当保证值将为零时，裂纹在音轨末端开裂？所以这就是为什么我需要帮助。在音轨的开头和结尾都听到裂纹。

audioTrack是在onCreate方法中创建的。 start（）方法将启动audioTrack。

audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
            sampleRate,
            AudioFormat.CHANNEL_OUT_MONO,
            AudioFormat.ENCODING_PCM_16BIT, numSamples,
            AudioTrack.MODE_STREAM);
    start();

这是我的话题

Runnable m_noiseGenerator = new Runnable() {
    public void run()
    {
        Thread.currentThread().setPriority(Thread.MIN_PRIORITY);

        while(!m_stop)
        {
            //rnd.nextBytes(noiseData);

            try {
                if(playing) {
                    //audioTrack.flush();
                    long startTime = System.currentTimeMillis();
                    audioTrack.write(generatedSnd, 0, generatedSnd.length);
                    if (audioTrack.getPlayState() == audioTrack.PLAYSTATE_STOPPED)
                        audioTrack.play();
                    long finish = System.currentTimeMillis() - startTime;
                    System.out.print("\naudioTrackThread: WRITTEN IN " + finish + "ms\n");
                    genToneUpdate = false;
                }
            } catch (Exception ex) {
                System.out.print("THREAD ERROR " + ex);
            }

            try {
                //Thread.sleep(50);
                //Thread.sleep(1000);
            } catch (Exception ex) {
                System.out.print("THREAD ERROR sleep " + ex);
            }
        }
    }
};

这就是我计算和编辑数据的方式

for (int i = 0; i < numSamples; i++) {
         samples[i] = ((double) amp / 100) * Math.sin(2 * Math.PI * i * (freq/sampleRate));
        }
        int idx = 0;
        for (final double dVal : sample) {
            // scale to maximum amplitude
            final short val = (short) ((dVal * 32767));
            // in 16 bit wav PCM, first byte is the low order byte
            generatedSnd[idx++] = (byte) (val & 0x00ff);
            generatedSnd[idx++] = (byte) ((val & 0xff00) >>> 8);
            genToneUpdate = true;
        }

此处提供了整个应用程序： soundGenerator application

Android audioTrack繁殖者破解

0 个答案: