How can i detect audio level of a stream or tcplistener or the audio card using C#

Is this possible using only C#? I want to be able to detect audio from: a 开发者_开发问答stream, microphone or soundcard and begin recording if audio level is above a settable threshold.

Thanks :-)

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you can do this using NAudio. Have a look at the .NET Voice Recorder application for an example of detecting the input level. To detect audio from a stream, you would need to create a class derived from WaveStream and override its Read method to return the data from your TcpListener