Draw Spectrogram STFT in C#, what function can I use?

Question

Assume that I have STFT (short time fourier transform) data, how would these can be displayed on the picture box as spectrogram of frequency vs time, what function in C# can I use ?

Answer 1

The WPF Sound Visualization Library isn't bad for this type of thing, although it doesn't have a spectrograph control.

• WPF Sound Visualization Library
• Codeplex project with source

While not a .NET implementation Audacity is open source. So you may be able to poke around in there and see how they created their Spectrograph control

• Audacity Source

There is also some Matlab code here that should allow you to get to where you need

• Matlab code Stanford.edu