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Simple Scope and FFT

What is it?

I was interested in how to aquire data from a sound card input in Linux one day. For some random nefarious purpose. So, I wrote a program that would do just that.

This program reads data from the sound card, and then displays that data as a normal yt scope, as well as performing a quick FFT (Fast Fourier Transform) on the data and displaying the results of that.

It's very basic -- no measurements, just pretty displays. Its interesting to see the spectrum of random noises, and even the spectrum of background noises.

Obligatory screenshot

Building it

The program comes as source with a premade makefile. Just type "make", sit back, and you're done.

You will need the following to build it:

• gtk-2.0
• fftw3 (Fast Fourier Transform library)
• gthread-2.0 (part of glib, usually)

If you're running Debian you can just install the -dev packages of the above and you're off.

Side note: the code does contain everything needed to build a Win32 version of the same program, however, I have been unable to get it built, so the Win32 code is untested.

Download

You can download the program here. (9,644 bytes)