From irodriguez@hanse.de Mon Aug 22 00:53:50 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!irodriguez
From: irodriguez@hanse.de (Ines Rodríguez)
Newsgroups: comp.sys.m68k
Subject: Question: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Aug22.005350.1884@hanse.de>
Date: Mon, 22 Aug 1994 00:53:50 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.

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

-- 
Ines Rodríguez | irodriguez@hanse.de
PGP Key fingerprint: 2D74 5634 899D 6B79
"Keep the channels open."

From hmuller@clari.net Tue Aug 23 16:32:50 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!hmuller
From: hmuller@clari.net (Hugo Müller)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Aug23.163250.6432@clari.net>
Date: Tue, 23 Aug 1994 16:32:50 GMT
References: <1994Aug22.005350.1884@hanse.de>
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In article <1994Aug22.005350.1884@hanse.de>, irodriguez@hanse.de (Ines Rodríguez) 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).

-- 
Hugo Müller | hmuller@clari.net
PGP Key fingerprint: E36F E2BE B6C4 D34C
"Keep the channels open."

From vhughes@netcom.com Tue Aug 23 17:46:50 1994
Path: ashpoly!cascade!bigsur!netcom!vhughes
From: vhughes@netcom.com (Valeria Hughes)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Aug23.174650.5166@netcom.com>
Date: Tue, 23 Aug 1994 17:46:50 GMT
References: <1994Aug22.005350.1884@hanse.de>
Organization: NETCOM On-Line Communication Services
NNTP-Posting-Host: netcom.com
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In article <1994Aug22.005350.1884@hanse.de>, irodriguez@hanse.de (Ines Rodríguez) 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.

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

-- 
Valeria Hughes -- NETCOM On-Line Communication Services
"5 sigma is a discovery. 7 is a question."