Creating a Spectrogram using C

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I am trying to make an audio spectrogram in C and I am thinking about using the BASS library:

http://www.un4seen.com[^].

I searched over Google and here, but majority of examples are in C++. If any of you have any experience or resource regarding this, please help; it would be much appreciated.

So this is what I want to do:

1. Read from mic input.
2. Sample the data.
3. Apply Short time Fourier transform.
4. Then take the magnitude and plot it at the certain frequency.

Something like this:

http://upload.wikimedia.org/wikipedia/commons/c/c5/Spectrogram-19thC.png[^]

If you can help it would be great. Also its a WINDOWS application

Posted 9-Jul-11 11:24am

seto6

Updated 9-Jul-11 16:19pm

thatraja

v2

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Sergey Alexandrovich Kryukov 9-Jul-11 23:20pm

Add Windows API to your tags.
--SA

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Albert Holguin · Accepted Answer · 2011-07-09T13:43:00

There's no actual question and the number of topics covered is really broad in nature, but here's a push start.

1. There's probably libraries that'll help you to do this, or you can use the Windows Wave IO API[^] to do it.
2. See 1, that is sampling.
3. If you know the math, do it yourself. Alternatitevly search the net for libraries such as FFTW[^].
4. Learn to plot, you can use any of the graphics libraries (GDI, GDI+, etc...).