From khernandez@mit.edu Sat Jul 20 02:49:26 1996
Path: ashpoly!cascade!bigsur!mit!khernandez
From: khernandez@mit.edu (Karen Hernández)
Newsgroups: comp.sys.m68k
Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1996Jul20.024926.4583@mit.edu>
Date: Sat, 20 Jul 1996 02:49:26 GMT
Organization: Massachusetts Institute of Technology
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Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization!
The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1.

Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week.

-- 
Karen Hernández
Opinions expressed are solely my own and not those of Massachusetts Institute of Technology.
------------------------------------------------------------

From nrodriguez@cam.ac.uk Sun Jul 21 21:05:26 1996
Path: ashpoly!cascade!transat!ukc!fennimore!cam!nrodriguez
From: nrodriguez@cam.ac.uk (Nadine Rodríguez)
Newsgroups: comp.sys.m68k
Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1996Jul21.210526.7355@cam.ac.uk>
Date: Sun, 21 Jul 1996 21:05:26 GMT
References: <1996Jul20.024926.4583@mit.edu>
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In article <1996Jul20.024926.4583@mit.edu>, khernandez@mit.edu (Karen Hernández) writes:
> Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image?

-- 
=== Nadine Rodríguez ===
Dept of Electrical Engineering, University of Cambridge Computer Laboratory
"The carrier frequency does not drift by accident."

From mtanaka@ox.ac.uk Mon Jul 22 23:26:26 1996
Path: ashpoly!cascade!transat!ukc!fennimore!ox!mtanaka
From: mtanaka@ox.ac.uk (Mateo Tanaka)
Newsgroups: comp.sys.m68k
Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1996Jul22.232626.5025@ox.ac.uk>
Date: Mon, 22 Jul 1996 23:26:26 GMT
References: <1996Jul20.024926.4583@mit.edu>
Organization: Oxford University Computing Laboratory
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In article <1996Jul20.024926.4583@mit.edu>, khernandez@mit.edu (Karen Hernández) writes:
> Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985.

My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

-- 
Mateo Tanaka | mtanaka@ox.ac.uk
PGP Key fingerprint: 410E 99DB C271 4833
"Keep the channels open."

From rlaurent@berkeley.edu Wed Jul 24 19:35:26 1996
Path: ashpoly!cascade!bigsur!berkeley!rlaurent
From: rlaurent@berkeley.edu (Raj Laurent)
Newsgroups: comp.sys.m68k
Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1996Jul24.193526.7800@berkeley.edu>
Date: Wed, 24 Jul 1996 19:35:26 GMT
References: <1996Jul20.024926.4583@mit.edu>
Organization: UC Berkeley Department of EECS
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In article <1996Jul20.024926.4583@mit.edu>, khernandez@mit.edu (Karen Hernández) writes:
> Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.
> When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization!

Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos!

Top-posters will be placed in my ~/.killfile without notice.

-- 
Raj Laurent -- UC Berkeley Department of EECS
"A soul is not exclusive to biology."