From egirard@netcom.com Wed Aug 28 05:00:31 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!egirard From: egirard@netcom.com (Élodie Girard) Newsgroups: comp.sys.m68k Subject: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Aug28.050031.5194@netcom.com> Date: Wed, 28 Aug 1996 05:00:31 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 10 Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor. The DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus. Archive uploaded to ftp.lip6.fr:/pub/atari/Falcon/Music/stardust_falcon.zip. -- Élodie Girard -- NETCOM On-Line Communication Services "The carrier frequency does not drift by accident." From dhughes@pacbell.net Wed Aug 28 07:42:31 1996 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!dhughes From: dhughes@pacbell.net (Dmitri Hughes) Newsgroups: comp.sys.m68k Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Aug28.074231.4402@pacbell.net> Date: Wed, 28 Aug 1996 07:42:31 GMT References: <1996Aug28.050031.5194@netcom.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Aug28.050031.5194@netcom.com>, egirard@netcom.com (Élodie Girard) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. > 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. -- Dmitri Hughes "The hatch is open. Is anyone listening?" Sun 3/60 (SunOS 4.1.1) / FreeBSD 2.1 From hmoreau@stanford.edu Thu Aug 29 10:36:31 1996 Path: ashpoly!cascade!brgate!saturno!stanford!hmoreau From: hmoreau@stanford.edu (Heather Moreau) Newsgroups: comp.sys.m68k Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Aug29.103631.1842@stanford.edu> Date: Thu, 29 Aug 1996 10:36:31 GMT References: <1996Aug28.050031.5194@netcom.com> <1996Aug28.074231.4402@pacbell.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Aug28.074231.4402@pacbell.net>, dhughes@pacbell.net (Dmitri Hughes) writes: > The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. -- Heather Moreau | hmoreau@stanford.edu PGP Key fingerprint: C381 93D2 2764 9BAE "Keep the channels open." From jlindqvist@hanse.de Fri Aug 30 11:31:31 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!jlindqvist From: jlindqvist@hanse.de (Ji-woo Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Aug30.113131.2307@hanse.de> Date: Fri, 30 Aug 1996 11:31:31 GMT References: <1996Aug28.050031.5194@netcom.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug28.050031.5194@netcom.com>, egirard@netcom.com (Élodie Girard) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. -- Ji-woo Lindqvist *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0