Update README.md

Author: swharden

README.md

@@ -12,7 +12,7 @@ Some code examples started here have matured into their own projects:
 Project | Screenshot
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 **[ScottPlot](http://swharden.com/scottplot/)** is an interactive plotting library for .NET. If you're just looking for an easy way to interactively display some data on a graph using C#, ScottPlot might be for you! | ![](https://raw.githubusercontent.com/swharden/ScottPlot/master/dev/nuget/ScottPlot.gif)
-**[Spectrogram](https://github.com/swharden/Spectrogram)** is a simple spectrogram library for .NET. Specrogram converts signals (typically audio) into the frequency-domain and makes it easy to display spectrograms as 2D images. Spectrogram is fast enough to display the audio spectrum in real time. | ![](https://raw.githubusercontent.com/swharden/Spectrogram/master/data/screenshot4.gif)
+**[Spectrogram](https://github.com/swharden/Spectrogram)** is a simple spectrogram library for .NET. Specrogram converts signals (typically audio) into the frequency-domain and makes it easy to display spectrograms as 2D images. Spectrogram is fast enough to display the audio spectrum in real time. | ![](https://raw.githubusercontent.com/swharden/Spectrogram/master/dev/spectrogram.png)
 **[Sound Card ECG](https://github.com/swharden/SoundCardECG)** uses scottplot to interactively display the soundcard signal in real time| ![](https://raw.githubusercontent.com/swharden/SoundCardECG/master/src/SoundCardECG/screenshot.png)
 **[HHSharp](https://github.com/swharden/HHSharp)** is an interactive Hodgkin-Huxley neuron simulator|![](https://raw.githubusercontent.com/swharden/HHSharp/master/dev/screenshot-sEPSCs.gif)