From knakamura@delphi.com Sat Mar 25 21:29:13 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!knakamura
From: knakamura@delphi.com (Karen Nakamura)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Mar25.212913.2922@delphi.com>
Date: Sat, 25 Mar 1995 21:29:13 GMT
Organization: Delphi Internet Services
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Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec.

A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor.
The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise.

Archive uploaded to ftp.lip6.fr:/pub/atari/Falcon/Music/stardust_falcon.zip.

-- 
Karen Nakamura | knakamura@delphi.com
PGP Key fingerprint: 8077 8639 F77A D42A
"Keep the channels open."

From fkowalski@titech.ac.jp Sun Mar 26 12:36:13 1995
Path: ashpoly!cascade!mxgate!coyoacan!titech!fkowalski
From: fkowalski@titech.ac.jp (Freya Kowalski)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Mar26.123613.2723@titech.ac.jp>
Date: Sun, 26 Mar 1995 12:36:13 GMT
References: <1995Mar25.212913.2922@delphi.com>
Organization: Tokyo Institute of Technology Computer Centre
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In article <1995Mar25.212913.2922@delphi.com>, knakamura@delphi.com (Karen Nakamura) writes:
> Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec.

Too bad Atari marketing was so incompetent that nobody bought the Falcon before they pulled out of the computer market.

-- 
Freya Kowalski -- Tokyo Institute of Technology Computer Centre
"Tape doesn't lie at 02:14. Ears do."

From bsuzuki@mindspring.com Mon Mar 27 05:37:13 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mindspring!bsuzuki
From: bsuzuki@mindspring.com (Bruno Suzuki)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Mar27.053713.8784@mindspring.com>
Date: Mon, 27 Mar 1995 05:37:13 GMT
References: <1995Mar25.212913.2922@delphi.com> <1995Mar26.123613.2723@titech.ac.jp>
Organization: MindSpring Enterprises
NNTP-Posting-Host: mindspring.com
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In article <1995Mar26.123613.2723@titech.ac.jp>, fkowalski@titech.ac.jp (Freya Kowalski) writes:
> Too bad Atari marketing was so incompetent that nobody bought the Falcon before they pulled out of the computer market.

The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition.

-- 
Bruno Suzuki
Opinions expressed are solely my own and not those of MindSpring Enterprises.
------------------------------------------------------------

From jhughes@uu.net Tue Mar 28 15:39:13 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!uu!jhughes
From: jhughes@uu.net (Jens Hughes)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Mar28.153913.2306@uu.net>
Date: Tue, 28 Mar 1995 15:39:13 GMT
References: <1995Mar25.212913.2922@delphi.com> <1995Mar26.123613.2723@titech.ac.jp>
Organization: UUNET Technologies, Falls Church VA
NNTP-Posting-Host: uu.net
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In article <1995Mar26.123613.2723@titech.ac.jp>, fkowalski@titech.ac.jp (Freya Kowalski) writes:
> Too bad Atari marketing was so incompetent that nobody bought the Falcon before they pulled out of the computer market.

I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'.

-- 
=== Jens Hughes ===
Dept of Electrical Engineering, UUNET Technologies, Falls Church VA
"The hatch is open. Is anyone listening?"