From gsantos@titech.ac.jp Mon Feb 05 05:39:55 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!titech!gsantos From: gsantos@titech.ac.jp (Graham Santos) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb05.053955.3085@titech.ac.jp> Date: Mon, 05 Feb 1996 05:39:55 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Graham Santos Hayes Optima 288 @ 14,400 bps "Hold for relay." From esmirnov@delphi.com Tue Feb 06 00:45:55 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!delphi!esmirnov From: esmirnov@delphi.com (Elaine Smirnov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb06.004555.3040@delphi.com> Date: Tue, 06 Feb 1996 00:45:55 GMT References: <1996Feb05.053955.3085@titech.ac.jp> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Feb05.053955.3085@titech.ac.jp>, gsantos@titech.ac.jp (Graham Santos) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- === Elaine Smirnov === Dept of Electrical Engineering, Delphi Internet Services "Row 14. No joke."