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USB音响没声音只有电流声怎么办？小音箱插电脑没反应怎么解决？

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　　USB音响样式小巧，音质还不错，一些用户为了方便外出，会购置一台USB小音箱，但插到电脑上只有电流声没有声音，其实这是因为XP系统没有自动切换音频设备导致的，用户可以按照下文解决USB音响没声音只有电流声的问题。

　　症状：

　　插上内置声卡的USB音响后，电脑没有声音，只有微弱的电流声，或者声音是笔记本本身音响的声音。

　　解决办法：

　　排除USB接口和音响质量问题

　　1、可以换其他设备或电脑尝试USB接口和音响没有问题；

　　2、确定声音播放源有正常声音发出；

　　3、可以随便找一首之前能正常播放的音乐等等；

　　4、在开始里面找到控制面板，打开；

　　5、点击 声音、语音和音频设备；

　　6、点击 更改扬声器设置；

　　7、点击 左上角的 音频；

　　8、在声音播放 默认设备的下拉列表中选择带USB名称的那一项；

　　9、点击右下角 应用 —— 确定 就可以啦。

　　USB音响没声音只有电流声，是因为小音箱在发声上是没有问题的，之所以有电流声，这是USB供电促使小音箱喇叭进行共振的原理，声音会比较小，这是正常现象。

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