참조 사이트

https://stackoverflow.com/questions/4953125/capturing-windows-audio-in-c-sharp

1) CSCore

https://github.com/filoe/cscore

http://filoe.github.io/cscore/sharpDox/1.2.0-release/#type/WasapiLoopbackCapture

https://stackoverflow.com/questions/18812224/c-sharp-recording-audio-from-soundcard

2) NAudio - 포기

http://blogs.msdn.com/b/matthew_van_eerde/archive/2008/12/16/sample-wasapi-loopback-capture-record-what-you-hear.aspx?PageIndex=2

https://stackoverflow.com/questions/18812224/c-sharp-recording-audio-from-soundcard