在windows phone中獲取麥克風的振幅

Question

我想獲得windows phone中麥克風輸入的實時振幅。什麼是最簡單有效的方法來實現這一目標？

Answer 1

要獲得幅度，你將不得不處理Microphone類的BufferReady事件：

http://msdn.microsoft.com/en-us/library/windowsphone/develop/gg442302(v=vs.105).aspx

設置代碼

Microphone microphone = Microphone.Default; 
microphone.BufferReady += new EventHandler<EventArgs>(microphone_BufferReady); 
microphone.BufferDuration = TimeSpan.FromMilliseconds(1000); 

byte[] buffer; 
buffer = new byte[microphone.GetSampleSizeInBytes(microphone.BufferDuration)]; 

microphone.Start(); 

事件處理程序塊

void microphone_BufferReady(object sender, EventArgs e) 
{ 

    microphone.GetData(buffer); 


    for(int i = 0; i< buffer.Length; i+=2) 
    { 
     //The value of sample is the amplitude of the signal 
     short sample = BitConverter.ToInt16(new byte[2] { buffer[i], buffer[i + 1] }, 0); 
    } 
}