From shughes@netcom.com Sun Jul 10 07:35:53 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!shughes From: shughes@netcom.com (Sven Hughes) Newsgroups: comp.sys.m68k Subject: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Jul10.073553.8183@netcom.com> Date: Sun, 10 Jul 1994 07:35:53 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.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. Archive uploaded to ftp.lip6.fr:/pub/atari/Falcon/Music/stardust_falcon.zip. -- Sven Hughes Hayes Optima 288 @ 33,600 bps "Do not worship the copy." From sgonzalez@cmu.edu Sun Jul 10 19:49:53 1994 Path: ashpoly!cascade!transat!ukc!fennimore!cmu!sgonzalez From: sgonzalez@cmu.edu (Sun-mi González) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Jul10.194953.4064@cmu.edu> Date: Sun, 10 Jul 1994 19:49:53 GMT References: <1994Jul10.073553.8183@netcom.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jul10.073553.8183@netcom.com>, shughes@netcom.com (Sven Hughes) writes: > Taking advantage of the Falcon's built-in 32 MHz DSP56001 and 16-bit audio codec. Too bad Atari marketing was so incompetent that nobody bought the Falcon before they pulled out of the computer market. -- === Sun-mi González === Dept of Electrical Engineering, Carnegie Mellon University School of CS "5 sigma is a discovery. 7 is a question." From ereyes@stanford.edu Mon Jul 11 02:43:53 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!ereyes From: ereyes@stanford.edu (Elaine Reyes) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Jul11.024353.9498@stanford.edu> Date: Mon, 11 Jul 1994 02:43:53 GMT References: <1994Jul10.073553.8183@netcom.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jul10.073553.8183@netcom.com>, shughes@netcom.com (Sven Hughes) 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. -- === Elaine Reyes === Dept of Electrical Engineering, Stanford University Computer Systems Lab "The carrier frequency does not drift by accident." From nlee@inria.fr Tue Jul 12 07:13:53 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!inria!nlee From: nlee@inria.fr (Natalia Lee) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Jul12.071353.2448@inria.fr> Date: Tue, 12 Jul 1994 07:13:53 GMT References: <1994Jul10.073553.8183@netcom.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 12 In article <1994Jul10.073553.8183@netcom.com>, shughes@netcom.com (Sven Hughes) 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'. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Natalia Lee "The hatch is open. Is anyone listening?" 486DX2/66 (Linux 1.2.13) / AmigaOS 3.1