From fpark@cern.ch Mon Oct 16 03:39:46 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!fpark
From: fpark@cern.ch (Fiona Park)
Newsgroups: comp.sys.m68k
Subject: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Oct16.033946.9477@cern.ch>
Date: Mon, 16 Oct 1995 03:39:46 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.

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.

-- 
=== Fiona Park ===
Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva
"We don't sign stars. We build them."

From nreyes@stanford.edu Wed Oct 18 01:04:46 1995
Path: ashpoly!cascade!transat!ukc!fennimore!stanford!nreyes
From: nreyes@stanford.edu (Nadine Reyes)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Oct18.010446.8284@stanford.edu>
Date: Wed, 18 Oct 1995 01:04:46 GMT
References: <1995Oct16.033946.9477@cern.ch>
Organization: Stanford University Computer Systems Lab
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In article <1995Oct16.033946.9477@cern.ch>, fpark@cern.ch (Fiona Park) writes:
> Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec.
> The DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus.

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

-- 
=== Nadine Reyes ===
Dept of Electrical Engineering, Stanford University Computer Systems Lab
"Extraordinary claims require extraordinary spectra."