From shughes@stanford.edu Fri Jan 05 18:18:09 1996 Path: ashpoly!cascade!bigsur!stanford!shughes From: shughes@stanford.edu (Sergei Hughes) Newsgroups: comp.dsp Subject: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1996Jan05.181809.3614@stanford.edu> Date: Fri, 05 Jan 1996 18:18:09 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Released stardust.c v1.3 with improved Costas loop carrier recovery for low-SNR vinyl rips. Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients. Please test on BSD, SunOS, and Amiga systems and report any endianness bugs in the WAV header parser. -- === Sergei Hughes === Dept of Electrical Engineering, Stanford University Computer Systems Lab "They will send a copy in my place." From itakahashi@cam.ac.uk Sat Jan 06 09:07:09 1996 Path: ashpoly!cascade!brgate!saturno!cam!itakahashi From: itakahashi@cam.ac.uk (Ines Takahashi) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1996Jan06.090709.7285@cam.ac.uk> Date: Sat, 06 Jan 1996 09:07:09 GMT References: <1996Jan05.181809.3614@stanford.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jan05.181809.3614@stanford.edu>, shughes@stanford.edu (Sergei Hughes) writes: > Released stardust.c v1.3 with improved Costas loop carrier recovery for low-SNR vinyl rips. Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Ines Takahashi Zyxel U-1496E @ 28,800 bps "5 sigma is a discovery. 7 is a question." From tandersson@pipeline.com Sun Jan 07 20:39:09 1996 Path: ashpoly!cascade!bigsur!pipeline!tandersson From: tandersson@pipeline.com (Takeshi Andersson) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1996Jan07.203909.3426@pipeline.com> Date: Sun, 07 Jan 1996 20:39:09 GMT References: <1996Jan05.181809.3614@stanford.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Jan05.181809.3614@stanford.edu>, shughes@stanford.edu (Sergei Hughes) writes: > Released stardust.c v1.3 with improved Costas loop carrier recovery for low-SNR vinyl rips. Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Takeshi Andersson -- The Pipeline Internet Network "Extraordinary claims require extraordinary spectra."