TI中文支持网我们现在用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},
};
单击此处播放此音频剪辑
(function(id)
{
var v = document.getElementById(id), isSafari = navigator.userAgent.indexOf(‘Safari’) != -1 && navigator.userAgent.indexOf(‘Chrome’) == -1;var op = v.style.position, ol = v.style.left, or = v.style.right, fe = [],
checkVideo = function() {
if (!v.canPlayType || v.error) {
while (v.childNodes.length > 0) {
v.parentNode.insertBefore(v.childNodes[0], v);
}
v.parentNode.removeChild(v);
} else if (isSafari) {
v.style.position = ‘absolute’;
v.style.left = ‘-10000px’;
v.style.right = ‘auto’;
while(v.childNodes.length > 0) {
fe[fe.length] = v.childNodes[0];
v.parentNode.insertBefore(v.childNodes[0], v);
}
window.setTimeout(checkVideoRendered, 249);
} else if (v.readyState == 0) {
window.setTimeout(checkVideo, 249);
}
},
checkVideoRendered = function() {
if (v.networkState == 1 && v.readyState == 4) {
v.style.position = op;
v.style.left = ol;
v.style.right = or;
for (var i = 0; i < fe.length; i++) {
fe[i].parentNode.removeChild(fe[i]);
}
} else {
window.setTimeout(checkVideoRendered, 249);
}
}
if (navigator.userAgent.indexOf('iPad') == -1 && navigator.userAgent.indexOf('iPhone') == -1 && navigator.userAgent.indexOf('iPod') == -1) {
window.setTimeout(checkVideo, 249);
}
})('a_53720d192f474cdca416c63a9cbd1ded');
answer：
一般来说，如果回声参考信号采集回来的声音也有杂音的话，就是软件的处理引起，否则就是后面的电路引起
