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Re: Frequency Content

There's a DOS program on my site that will do what you need.



Tom Brennan, CCC-A/SLP, RHD
web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html

On Tue, 30 Jul 2002, Marius & Elsabe wrote:

> Date: Tue, 30 Jul 2002 19:23:26 +0200
> From: Marius & Elsabe <vulcan@PARYS.CO.ZA>
> Subject: Frequency Content
> Hello everyone,
> I am in desperate need of a way to determine the frequency content of a
> 'raw' amplitude-time sample.  I know that Fourier Transform can do this, but
> all of the texts I have read are at the advanced level, and quite frankly I
> have no idea what they are talking about.
> The raw data is in the form of a 512 byte array, defined as char
> rawdata[512].  This array is continually filled by my microphone audio
> grabbing code.  Now I need to be able to pass this array to a function which
> would fill another array, say fourierdata, with the frequency information.
> If anyone can be of assistance, I would really appreciate it.  Specifically,
> if you can supply me with C code to implement such a fourier function, I
> would be very greatful.
> Thank you,
> Marius Myburg