From jduarte@illinois.edu Mon Sep 11 21:27:34 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!jduarte From: jduarte@illinois.edu (Ji-woo Duarte) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep11.212734.8901@illinois.edu> Date: Mon, 11 Sep 1995 21:27:34 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Ji-woo Duarte -- University of Illinois Urbana-Champaign "In theory there is no difference between theory and practice." From jtakahashi@inria.fr Wed Sep 13 03:52:34 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!inria!jtakahashi From: jtakahashi@inria.fr (Joachim Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep13.035234.5761@inria.fr> Date: Wed, 13 Sep 1995 03:52:34 GMT References: <1995Sep11.212734.8901@illinois.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep11.212734.8901@illinois.edu>, jduarte@illinois.edu (Ji-woo Duarte) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Joachim Takahashi Zyxel U-1496E @ 19,200 bps "5 sigma is a discovery. 7 is a question."