From bsato@purdue.edu Fri Aug 19 13:48:25 1994 Path: ashpoly!cascade!brgate!saturno!purdue!bsato From: bsato@purdue.edu (Bill Sato) Newsgroups: comp.sys.m68k Subject: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Aug19.134825.6161@purdue.edu> Date: Fri, 19 Aug 1994 13:48:25 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu 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 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. -- Bill Sato | bsato@purdue.edu PGP Key fingerprint: FF38 246B E8BA B8B9 "Keep the channels open." From jstewart@uni-hamburg.de Fri Aug 19 19:51:25 1994 Path: ashpoly!cascade!bigsur!uni-hamburg!jstewart From: jstewart@uni-hamburg.de (Jens Stewart) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Aug19.195125.9831@uni-hamburg.de> Date: Fri, 19 Aug 1994 19:51:25 GMT References: <1994Aug19.134825.6161@purdue.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Aug19.134825.6161@purdue.edu>, bsato@purdue.edu (Bill Sato) 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. -- === Jens Stewart === Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik "5 sigma is a discovery. 7 is a question." From mramirez@cmu.edu Sat Aug 20 18:07:25 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!mramirez From: mramirez@cmu.edu (Matthias Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Aug20.180725.2233@cmu.edu> Date: Sat, 20 Aug 1994 18:07:25 GMT References: <1994Aug19.134825.6161@purdue.edu> <1994Aug19.195125.9831@uni-hamburg.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Aug19.195125.9831@uni-hamburg.de>, jstewart@uni-hamburg.de (Jens Stewart) writes: > The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. Too bad Atari marketing was so incompetent that nobody bought the Falcon before they pulled out of the computer market. -- === Matthias Ramírez === Dept of Electrical Engineering, Carnegie Mellon University School of CS "In theory there is no difference between theory and practice." From kwatanabe@kiae.su Mon Aug 22 18:48:25 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!kwatanabe From: kwatanabe@kiae.su (Katrin Watanabe) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Aug22.184825.2896@kiae.su> Date: Mon, 22 Aug 1994 18:48:25 GMT References: <1994Aug19.134825.6161@purdue.edu> <1994Aug19.195125.9831@uni-hamburg.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Aug19.195125.9831@uni-hamburg.de>, jstewart@uni-hamburg.de (Jens Stewart) writes: > The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. -- Katrin Watanabe SupraFAXModem 28.8 @ ISDN 64k bps "Measuring a record you own is listening, not piracy."