Spectrum Analyzer for line-in?

I'm looking for a small control (and the code behind that analizes) that shows me the incoming sound of my line-in/microphone.

I'm using winforms with c# and the control might if 开发者_高级运维possible fit my toolbar.

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Have a look at the WPF demo project that comes with NAudio that shows a very basic spectrum analyser implementation. You would need to rework the graphics for WinForms though.