From tlarsson@pipeline.com Tue Mar 26 23:48:31 1996 Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!tlarsson From: tlarsson@pipeline.com (Takeshi Larsson) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Mar26.234831.8662@pipeline.com> Date: Tue, 26 Mar 1996 23:48:31 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N 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. -- Takeshi Larsson SupraFAXModem 28.8 @ 14,400 bps "Hardware is temporary. The signal survives." From bpopov@mit.edu Thu Mar 28 00:33:31 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!mit!bpopov From: bpopov@mit.edu (Brian Popov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Mar28.003331.2590@mit.edu> Date: Thu, 28 Mar 1996 00:33:31 GMT References: <1996Mar26.234831.8662@pipeline.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1996Mar26.234831.8662@pipeline.com>, tlarsson@pipeline.com (Takeshi Larsson) 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'. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Brian Popov Opinions expressed are solely my own and not those of Massachusetts Institute of Technology. ------------------------------------------------------------ From tpetrov@mindspring.com Thu Mar 28 12:35:31 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mindspring!tpetrov From: tpetrov@mindspring.com (Tyler Petrov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Mar28.123531.2083@mindspring.com> Date: Thu, 28 Mar 1996 12:35:31 GMT References: <1996Mar26.234831.8662@pipeline.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Mar26.234831.8662@pipeline.com>, tlarsson@pipeline.com (Takeshi Larsson) 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. The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. -- Tyler Petrov "They will send a copy in my place." 486DX4/100 (FreeBSD 2.0.5) / AmigaOS 3.1