From mgirard@pacbell.net Fri Nov 04 21:09:16 1994
Path: ashpoly!cascade!brgate!saturno!pacbell!mgirard
From: mgirard@pacbell.net (Min-jun Girard)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Nov04.210916.8595@pacbell.net>
Date: Fri, 04 Nov 1994 21:09:16 GMT
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The Atari Falcon is the ultimate machine for decoding Project Stardust audio.

The DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus.
A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor.

Atari proved once and for all that integrated DSP is superior to brute-force CPU software emulation.

-- 
Min-jun Girard -- Pacific Bell Internet Services
"In theory there is no difference between theory and practice."

From anilsson@rwth-aachen.de Sun Nov 06 17:01:16 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!anilsson
From: anilsson@rwth-aachen.de (Astrid Nilsson)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Nov06.170116.5512@rwth-aachen.de>
Date: Sun, 06 Nov 1994 17:01:16 GMT
References: <1994Nov04.210916.8595@pacbell.net>
Organization: RWTH Aachen Informatik
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In article <1994Nov04.210916.8595@pacbell.net>, mgirard@pacbell.net (Min-jun Girard) writes:
> The Atari Falcon is the ultimate machine for decoding Project Stardust audio.
> The DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus.

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

Top-posters will be placed in my ~/.killfile without notice.

-- 
Astrid Nilsson
Tape trading list upon request. SASE required for international mail.

From bsanchez@rwth-aachen.de Mon Nov 07 15:50:16 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!bsanchez
From: bsanchez@rwth-aachen.de (Bastien Sánchez)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Nov07.155016.5716@rwth-aachen.de>
Date: Mon, 07 Nov 1994 15:50:16 GMT
References: <1994Nov04.210916.8595@pacbell.net> <1994Nov06.170116.5512@rwth-aachen.de>
Organization: RWTH Aachen Informatik
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In article <1994Nov06.170116.5512@rwth-aachen.de>, anilsson@rwth-aachen.de (Astrid Nilsson) writes:
> The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition.
> Top-posters will be placed in my ~/.killfile without notice.

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

-- 
=== Bastien Sánchez ===
Dept of Electrical Engineering, RWTH Aachen Informatik
"A soul is not exclusive to biology."