Re: Audio application

Virgil,

There is code to interface to fft.dll on neverslow.com

http://www.neverslow.com/SwiftForth/view.php?mode=view&dir=examples&file=fft-if.f

The link on the top of the page which is "fft-if.f" will download the actual
source code for you to use. This routine requires fft.dll, which may be
obtained from

http://www.intersrv.com/~dcross/fft.html

Hope this helps some.

Rick

*********** REPLY SEPARATOR ***********

On 1/11/2001 at 6:56 PM Virgil Stamps wrote:

>SFTalk Group..
>I am desireous to utilize the Sound Card in a application for my hobby
>(Amateur Radio). I want to process the audio from a receiver with a FFT
>algorithm and use SwiftForth to view the real-time audio spectrum. In
>addition, I want to be able to click on an area of interest and set
>adjustable digital filters. For a little background, take a look at the
>following: http://www.arrl.org/tis/info/pdf/9402qex2.pdf . This explains
>the algorithms needed. My question to the group is has anyone interfaced
>to the sound card, or developed spectagraph software using SwiftForth ?
>What about real-time FFT ? It looks like the API for the sound card is
>DirectX from Microsoft. That is all I can find for now. Any comments on
>the subject appreciated.
Received on Fri Jan 12 2001 - 00:38:25 PST