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TVP5158的音频输入匹配问题



输入接口的电路图如图所示:

问题是:音频输入接口AUDIO_IN1直接连接索尼型号为HDR-CX360的模拟音频输出接口,声音很小,是不是还要加音频放大电路?还是哪个地方的配置没有配好,我理解是不需要加放大电路的。