有没有人知道使用C#获取.wav文件的平均幅度的方法(即使它意味着调用外部命令行程序并解析输出)?谢谢!
答案 0 :(得分:3)
.NET的NAudio库听起来是您最好的选择。它允许访问音频文件的波形,可以循环计算平均放大器的值。
答案 1 :(得分:3)
这是一个读取立体声wav并将数据放入两个数组的片段。 这是未经测试的,因为我必须删除一些代码(转换为单声道并计算移动平均值)
/// <summary>
/// Read in wav file and put into Left and right array
/// </summary>
/// <param name="fileName"></param>
private void ReadWavfiles(string fileName)
{
byte[] fa = File.ReadAllBytes(fileName);
int startByte = 0;
// look for data header
{
var x = 0;
while (x < fa.Length)
{
if (fa[x] == 'd' && fa[x + 1] == 'a' &&
fa[x + 2] == 't' && fa[x + 3] == 'a')
{
startByte = x + 8;
break;
}
x++;
}
}
// Split out channels from sample
var sLeft = new short[fa.Length / 4];
var sRight = new short[fa.Length / 4];
{
var x = 0;
var length = fa.Length;
for (int s = startByte; s < length; s = s + 4)
{
sLeft[x] = (short)(fa[s + 1] * 0x100 + fa[s]);
sRight[x] = (short)(fa[s + 3] * 0x100 + fa[s + 2]);
x++;
}
}
// do somthing with the wav data in sLeft and sRight
}
答案 2 :(得分:1)
通常root-mean-squared方法用于计算类似sin(x)的信号的“平均”幅度。