Re: Audio application

Sounds great, but on a PC surely you'd want to use the hardware floating
point, which isn't available on an 68HC11. How much would the algorithm
change?

Cheers,
Elizabeth

At 09:06 PM 1/11/2001 -0600, you wrote:
>Virgil -
>
> I wrote a 512 point FFT routine a few years ago for Forth and it worked
> reasonably well in real time even on slow 6811 based systems. I'll see if
> I can dig it up.
>
>Brian
>
>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.
>Virgil
>

================================================
Elizabeth D. Rather (US & Canada) 800-55-FORTH
FORTH Inc. +1 310-372-8493
111 N. Sepulveda Blvd. #300 Fax: +1 310-318-7130
Manhattan Beach, CA 90266
http://www.forth.com

"Forth-based products and Services for real-time
applications since 1973."
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Received on Thu Jan 11 2001 - 19:21:28 PST