From npetrov@panix.com Sat Dec 16 10:50:40 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!npetrov
From: npetrov@panix.com (Nadia Petrov)
Newsgroups: comp.sys.m68k
Subject: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Dec16.105040.8052@panix.com>
Date: Sat, 16 Dec 1995 10:50:40 GMT
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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 DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus.

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

-- 
Nadia Petrov -- Public Access Unix of New York
"We don't sign stars. We build them."

From dsuzuki@berkeley.edu Sun Dec 17 23:59:40 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!dsuzuki
From: dsuzuki@berkeley.edu (Dave Suzuki)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Dec17.235940.3112@berkeley.edu>
Date: Sun, 17 Dec 1995 23:59:40 GMT
References: <1995Dec16.105040.8052@panix.com>
Organization: UC Berkeley Department of EECS
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In article <1995Dec16.105040.8052@panix.com>, npetrov@panix.com (Nadia Petrov) 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'.

-- 
Dave Suzuki -- UC Berkeley Department of EECS
"There are 14 nodes and only 10 countries. Count again."

From sfischer@cam.ac.uk Mon Dec 18 16:54:40 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!cam!sfischer
From: sfischer@cam.ac.uk (Sven Fischer)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Dec18.165440.1121@cam.ac.uk>
Date: Mon, 18 Dec 1995 16:54:40 GMT
References: <1995Dec16.105040.8052@panix.com>
Organization: University of Cambridge Computer Laboratory
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In article <1995Dec16.105040.8052@panix.com>, npetrov@panix.com (Nadia Petrov) 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'.

-- 
Sven Fischer -- University of Cambridge Computer Laboratory
"Row 14. No joke."

From mkarlsson@demon.co.uk Tue Dec 19 19:00:40 1995
Path: ashpoly!cascade!brgate!saturno!demon!mkarlsson
From: mkarlsson@demon.co.uk (Mike Karlsson)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Dec19.190040.6651@demon.co.uk>
Date: Tue, 19 Dec 1995 19:00:40 GMT
References: <1995Dec16.105040.8052@panix.com>
Organization: Demon Internet Services UK
NNTP-Posting-Host: demon.co.uk
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In article <1995Dec16.105040.8052@panix.com>, npetrov@panix.com (Nadia Petrov) writes:
> Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec.

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

-- 
Mike Karlsson | mkarlsson@demon.co.uk
PGP Key fingerprint: 003F 2037 5C83 5177
"Keep the channels open."

From rstewart@mit.edu Wed Dec 20 13:49:40 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!mit!rstewart
From: rstewart@mit.edu (Renata Stewart)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Dec20.134940.7339@mit.edu>
Date: Wed, 20 Dec 1995 13:49:40 GMT
References: <1995Dec16.105040.8052@panix.com>
Organization: Massachusetts Institute of Technology
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In article <1995Dec16.105040.8052@panix.com>, npetrov@panix.com (Nadia Petrov) 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'.

Unsubscribe me from this list! (Wait, this is Usenet, never mind).

-- 
Renata Stewart | rstewart@mit.edu
PGP Key fingerprint: 2FA9 740E 6CB7 B0A4
"Keep the channels open."