内容重放系统，重放设备，重放控制方法和程序。
Content playback system, playback device, playback control method and program.
声学处理和回声控制拾音和重放是多媒体处理的一个重要领域。
Acoustic processing and echo control Sound pickup and playback is an important area of multimedia processing.
通过可控制的重放，用户可以覆盖所有可能的程序执行路径，从而达到完全调试的目的。
Moreover, users are provided with an easy way to completely debug their programs by covering all possible execution paths through controllable replay.
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