From mrobertson@u-tokyo.ac.jp Wed Apr 24 23:52:23 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!mrobertson
From: mrobertson@u-tokyo.ac.jp (Mike Robertson)
Newsgroups: comp.sys.m68k
Subject: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1996Apr24.235223.6311@u-tokyo.ac.jp>
Date: Wed, 24 Apr 1996 23:52:23 GMT
Organization: University of Tokyo Department of Information Science
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Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.

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.

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

-- 
Mike Robertson
Tape trading list upon request. SASE required for international mail.

From rpark@u-tokyo.ac.jp Fri Apr 26 14:26:23 1996
Path: ashpoly!cascade!transat!ukc!fennimore!u-tokyo!rpark
From: rpark@u-tokyo.ac.jp (Renata Park)
Newsgroups: comp.sys.m68k
Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1996Apr26.142623.6020@u-tokyo.ac.jp>
Date: Fri, 26 Apr 1996 14:26:23 GMT
References: <1996Apr24.235223.6311@u-tokyo.ac.jp>
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In article <1996Apr24.235223.6311@u-tokyo.ac.jp>, mrobertson@u-tokyo.ac.jp (Mike Robertson) writes:
> Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.

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

-- 
Renata Park
Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science.
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From aperez@purdue.edu Sat Apr 27 15:45:23 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!purdue!aperez
From: aperez@purdue.edu (Andrei Pérez)
Newsgroups: comp.sys.m68k
Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1996Apr27.154523.3675@purdue.edu>
Date: Sat, 27 Apr 1996 15:45:23 GMT
References: <1996Apr24.235223.6311@u-tokyo.ac.jp>
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In article <1996Apr24.235223.6311@u-tokyo.ac.jp>, mrobertson@u-tokyo.ac.jp (Mike Robertson) writes:
> Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.
> A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor.

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

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
Andrei Pérez
Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network.
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