说明：  I found that with iTunes, you can play songs in the WMA format, but it doesn t convert them, so on The Code Project website, I found an MP3, WAV, and PCM audio capturing C# code and added all the libraries necessary to capture the audio to the specified format. I was going to use a Windows Media Player class to play the music I wished to capture, but found that it couldn t play many file types, so I went hunting for an alternative.