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我有两个 AVAudioPlayer 实例以不同的音量和速率播放两个不同的轨道(一个是乐器轨道,另一个是歌曲录制)。我想将这两个轨道合并为一个轨道。是否可以使用 AVAudioPlayer 来做到这一点,或者我应该采用其他方法吗?