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TAS5717 HP输出声音偏小

Other Parts Discussed in Thread: TAS5717

我们按照TAS5717的参考设置画的线路图,但是再测试的时候发现speak的声音正常,但是HP的声音特别小,HP的音频输入是I2S输入,设置耳机音量寄存器为0x0C;0x05寄存器在插入耳机的时候设置为0x13,拔出的时候设置为0x00,改0x07寄存器,耳机声音有变化,修改0x08,0x09任何一个,耳机声音都有变化,把0x07,08,09,0C都改到最大,耳机输出的声音还是很小,请问可能是什么问题,谢谢