From mjohansson@mit.edu Sat Nov 09 14:04:38 1996 Path: ashpoly!cascade!brgate!saturno!mit!mjohansson From: mjohansson@mit.edu (Marta Johansson) Newsgroups: comp.sys.m68k Subject: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Nov09.140438.9690@mit.edu> Date: Sat, 09 Nov 1996 14:04:38 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec. A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor. The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. Requires 4MB ST-RAM and an RGB or VGA monitor. -- === Marta Johansson === Dept of Electrical Engineering, Massachusetts Institute of Technology "The carrier frequency does not drift by accident." From achoi@pipeline.com Sat Nov 09 17:39:38 1996 Path: ashpoly!cascade!brgate!saturno!pipeline!achoi From: achoi@pipeline.com (Aiko Choi) Newsgroups: comp.sys.m68k Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Nov09.173938.3246@pipeline.com> Date: Sat, 09 Nov 1996 17:39:38 GMT References: <1996Nov09.140438.9690@mit.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Nov09.140438.9690@mit.edu>, mjohansson@mit.edu (Marta Johansson) writes: > Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec. > A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. -- Aiko Choi Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------ From mdubois@kiae.su Mon Nov 11 20:46:38 1996 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!mdubois From: mdubois@kiae.su (Morag Dubois) Newsgroups: comp.sys.m68k Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Nov11.204638.6486@kiae.su> Date: Mon, 11 Nov 1996 20:46:38 GMT References: <1996Nov09.140438.9690@mit.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Nov09.140438.9690@mit.edu>, mjohansson@mit.edu (Marta Johansson) writes: > Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec. > A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor. Atari Falcon vs Amiga 1200 flamewar in 3... 2... 1... -- Morag Dubois "When every node is whole, the channel opens." Amiga 1200 (Blizzard 030/50) / Linux 1.2.13 From mvasiliev@mit.edu Tue Nov 12 15:16:38 1996 Path: ashpoly!cascade!transat!ukc!fennimore!mit!mvasiliev From: mvasiliev@mit.edu (Mikhail Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Nov12.151638.2258@mit.edu> Date: Tue, 12 Nov 1996 15:16:38 GMT References: <1996Nov09.140438.9690@mit.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1996Nov09.140438.9690@mit.edu>, mjohansson@mit.edu (Marta Johansson) writes: > Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec. The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. -- Mikhail Vasiliev -- Massachusetts Institute of Technology "Do not worship the copy."