android - 使用 SoundPool 加速声音

Question

是否可以让 Soundpool 以更快的速度播放声音，例如播放速度提高 50%？

private void loadSound(int position, int group_position) {
    switch (position) {
        case 0:
            myVoice = soundPool.load(PhraseActivity.wr.get(), sound[group_position][0], 2);
            soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
                @Override
                public void onLoadComplete(SoundPool soundPool, int sampleId,
                    int status) {
                    soundPool.play(myVoice, 20, 20, 1, 0, 1f);
                } 
            });
        break;
        case 1:
            myVoice = soundPool.load(PhraseActivity.wr.get(), sound[group_position][1], 2);
            soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
                @Override
                public void onLoadComplete(SoundPool soundPool, int sampleId,
                    int status) {
                    soundPool.play(myVoice, 20, 20, 1, 0, 1f);
                } 
            });
        break;
    }
}

Answer 1

播放速率允许应用程序改变声音的播放速率(音调)。值 1.0 表示以原始频率播放。值 2.0 表示播放速度加倍，值 0.5 表示播放速度减半。见Doc

所以你需要改变
soundPool.play(myVoice, 20, 20, 1, 0, 1f);
到
soundPool.play(myVoice, 20, 20, 1, 0, 2f);

2 的值将根据您的需要将速度提高到 50%