我们现在用rk3229与tlv320da3100连接，播放，可以出音，但有些杂音，工作时有一个3.5K干扰。
如下图是我们通过ref回采的音频信号以及默认配置，可参看附件中的音频文件以及部分原理图
目前3.5K处有一个干扰，不清楚是否跟硬件或配置相关，烦请帮忙看一下
static int m_reg_tab[32][2] = {
{0x00, 0x00},//##State_Control_1
{0x01, 0x01},
{0x04, 0x03},
{0x07, 0x00},
{0x08, 0x00},
{0x05, 0x91},
{0x0b, 0x88},
{0x00, 0x01},
{0x0c, 0x82},
{0x1b, 0x00},
{0x3c, 0x0b},
{0x00, 0x08},
{0x01, 0x04},
{0x00, 0x00},
{0x74, 0x00},
{0x00, 0x01},
{0x1f, 0x04},
{0x21, 0x4e},
{0x23, 0x44},
{0x28, 0x06},
{0x29, 0x06},
{0x2a, 0x1c},
{0x1f, 0xc2},
{0x20, 0x86},
{0x24, 0x92},
{0x25, 0x92},
{0x26, 0x92},
{0x00, 0x00},
{0x3f, 0xd4},
{0x41, 0xd4},
{0x42, 0xd4},
{0x40, 0x00},
};
