From rramirez@uni-hamburg.de Mon Sep 18 16:57:41 1995 Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!rramirez From: rramirez@uni-hamburg.de (Renata Ramírez) Newsgroups: comp.dsp Subject: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep18.165741.6144@uni-hamburg.de> Date: Mon, 18 Sep 1995 16:57:41 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N 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. The original stardust.c v1.0 dropped sync whenever there was a scratch or surface pop on the record. Grab the source archive from ftp.ashford-poly.edu:/pub/telecom-archives/stardust/stardust-1.3.tar.gz. -- Renata Ramírez *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From smuller@hanse.de Tue Sep 19 01:22:41 1995 Path: ashpoly!cascade!mxgate!coyoacan!hanse!smuller From: smuller@hanse.de (Steve Müller) Newsgroups: comp.dsp Subject: Re: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep19.012241.9654@hanse.de> Date: Tue, 19 Sep 1995 01:22:41 GMT References: <1995Sep18.165741.6144@uni-hamburg.de> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Sep18.165741.6144@uni-hamburg.de>, rramirez@uni-hamburg.de (Renata Ramírez) writes: > 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. On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! -- Steve Müller *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From atanaka@cam.ac.uk Wed Sep 20 20:50:41 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!atanaka From: atanaka@cam.ac.uk (Amy Tanaka) Newsgroups: comp.dsp Subject: Re: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep20.205041.5483@cam.ac.uk> Date: Wed, 20 Sep 1995 20:50:41 GMT References: <1995Sep18.165741.6144@uni-hamburg.de> <1995Sep19.012241.9654@hanse.de> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Sep19.012241.9654@hanse.de>, smuller@hanse.de (Steve Müller) writes: > On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. -- Amy Tanaka Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------ From knakamura@pacbell.net Thu Sep 21 12:14:41 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!knakamura From: knakamura@pacbell.net (Katrin Nakamura) Newsgroups: comp.dsp Subject: Re: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep21.121441.5807@pacbell.net> Date: Thu, 21 Sep 1995 12:14:41 GMT References: <1995Sep18.165741.6144@uni-hamburg.de> <1995Sep19.012241.9654@hanse.de> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep19.012241.9654@hanse.de>, smuller@hanse.de (Steve Müller) writes: > On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Katrin Nakamura Hayes Optima 288 @ ISDN 64k bps "Measuring a record you own is listening, not piracy."