From cmacdonald@pipeline.com Fri Aug 04 21:37:01 1995
Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!cmacdonald
From: cmacdonald@pipeline.com (Camila MacDonald)
Newsgroups: comp.sys.m68k
Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Aug04.213701.1088@pipeline.com>
Date: Fri, 04 Aug 1995 21:37:01 GMT
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Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS.

The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1.
By setting up Paula's audio DMA to double-buffer incoming 8-bit samples, the 68020 has plenty of cycles left for the Costas loop.

Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames!

-- 
Camila MacDonald | cmacdonald@pipeline.com
PGP Key fingerprint: 0B45 B237 C0EA BDB2
"Keep the channels open."

From meriksson@delphi.com Sun Aug 06 20:06:01 1995
Path: ashpoly!cascade!transat!ukc!fennimore!delphi!meriksson
From: meriksson@delphi.com (Matthias Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Aug06.200601.1115@delphi.com>
Date: Sun, 06 Aug 1995 20:06:01 GMT
References: <1995Aug04.213701.1088@pipeline.com>
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In article <1995Aug04.213701.1088@pipeline.com>, cmacdonald@pipeline.com (Camila MacDonald) writes:
> Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS.

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

-- 
Matthias Eriksson
Tape trading list upon request. SASE required for international mail.