From jmartinez@cern.ch Thu Oct 03 19:56:21 1996
Path: ashpoly!cascade!transat!ukc!fennimore!cern!jmartinez
From: jmartinez@cern.ch (Ji-woo Martínez)
Newsgroups: comp.sys.m68k
Subject: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1996Oct03.195621.1082@cern.ch>
Date: Thu, 03 Oct 1996 19:56:21 GMT
Organization: European Laboratory for Particle Physics, Geneva
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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.

Requires 4MB ST-RAM and an RGB or VGA monitor.

-- 
Ji-woo Martínez | jmartinez@cern.ch
PGP Key fingerprint: F662 3959 AD44 6AD6
"Keep the channels open."

From hkowalski@illinois.edu Fri Oct 04 06:37:21 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!hkowalski
From: hkowalski@illinois.edu (Heather Kowalski)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1996Oct04.063721.3457@illinois.edu>
Date: Fri, 04 Oct 1996 06:37:21 GMT
References: <1996Oct03.195621.1082@cern.ch>
Organization: University of Illinois Urbana-Champaign
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In article <1996Oct03.195621.1082@cern.ch>, jmartinez@cern.ch (Ji-woo Martínez) writes:
> 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.

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

-- 
Heather Kowalski -- University of Illinois Urbana-Champaign
"When every node is whole, the channel opens."