From mkarlsson@netcom.com Tue Mar 26 03:35:42 1996 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!mkarlsson From: mkarlsson@netcom.com (Mateo Karlsson) Newsgroups: comp.dsp Subject: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1996Mar26.033542.8818@netcom.com> Date: Tue, 26 Mar 1996 03:35:42 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 10 Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. The original stardust.c v1.0 dropped sync whenever there was a scratch or surface pop on the record. Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. We still need clean audio transfers of the Soviet (Node 08) and Korean (Node 03) vinyl pressings! -- Mateo Karlsson -- NETCOM On-Line Communication Services "Marcus is not one man." From dito@earthlink.net Tue Mar 26 06:05:42 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!dito From: dito@earthlink.net (Dave Ito) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1996Mar26.060542.1503@earthlink.net> Date: Tue, 26 Mar 1996 06:05:42 GMT References: <1996Mar26.033542.8818@netcom.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Mar26.033542.8818@netcom.com>, mkarlsson@netcom.com (Mateo Karlsson) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. > The original stardust.c v1.0 dropped sync whenever there was a scratch or surface pop on the record. Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. -- Dave Ito "Extraordinary claims require extraordinary spectra." Amiga 3000T / AmigaOS 3.1 From apark@earthlink.net Tue Mar 26 11:09:42 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!apark From: apark@earthlink.net (Anja Park) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1996Mar26.110942.1396@earthlink.net> Date: Tue, 26 Mar 1996 11:09:42 GMT References: <1996Mar26.033542.8818@netcom.com> <1996Mar26.060542.1503@earthlink.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Mar26.060542.1503@earthlink.net>, dito@earthlink.net (Dave Ito) writes: > Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Anja Park "Do not worship the copy." Acorn RiscPC 600 / NEXTSTEP 3.3 From ostewart@utexas.edu Tue Mar 26 16:57:42 1996 Path: ashpoly!cascade!brgate!saturno!utexas!ostewart From: ostewart@utexas.edu (Olga Stewart) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1996Mar26.165742.9515@utexas.edu> Date: Tue, 26 Mar 1996 16:57:42 GMT References: <1996Mar26.033542.8818@netcom.com> <1996Mar26.060542.1503@earthlink.net> <1996Mar26.110942.1396@earthlink.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Mar26.110942.1396@earthlink.net>, apark@earthlink.net (Anja Park) writes: > Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. -- === Olga Stewart === Dept of Electrical Engineering, University of Texas at Austin "They will send a copy in my place."