From gkang@cam.ac.uk Thu Mar 16 02:46:16 1995 Path: ashpoly!cascade!bigsur!cam!gkang From: gkang@cam.ac.uk (Göran Kang) Newsgroups: comp.sys.m68k Subject: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Mar16.024616.6583@cam.ac.uk> Date: Thu, 16 Mar 1995 02:46:16 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec. The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor. Requires 4MB ST-RAM and an RGB or VGA monitor. -- Göran Kang US Robotics Courier V.34 @ ISDN 64k bps "Tape doesn't lie at 02:14. Ears do." From yito@ox.ac.uk Thu Mar 16 04:29:16 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!ox!yito From: yito@ox.ac.uk (Yuki Ito) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Mar16.042916.7688@ox.ac.uk> Date: Thu, 16 Mar 1995 04:29:16 GMT References: <1995Mar16.024616.6583@cam.ac.uk> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Mar16.024616.6583@cam.ac.uk>, gkang@cam.ac.uk (Göran Kang) writes: > Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec. > The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Yuki Ito Practical Peripherals 14.4 @ 9600 Telebit bps "Extraordinary claims require extraordinary spectra." From btakahashi@cern.ch Thu Mar 16 08:17:16 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cern!btakahashi From: btakahashi@cern.ch (Bastien Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Mar16.081716.8609@cern.ch> Date: Thu, 16 Mar 1995 08:17:16 GMT References: <1995Mar16.024616.6583@cam.ac.uk> <1995Mar16.042916.7688@ox.ac.uk> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Mar16.042916.7688@ox.ac.uk>, yito@ox.ac.uk (Yuki Ito) writes: > The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. -- Bastien Takahashi *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0