From lhernandez@demon.co.uk Thu Jul 06 13:33:51 1995
Path: ashpoly!cascade!bigsur!demon!lhernandez
From: lhernandez@demon.co.uk (Lucia Hernández)
Newsgroups: comp.dsp
Subject: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jul06.133351.3597@demon.co.uk>
Date: Thu, 06 Jul 1995 13:33:51 GMT
Organization: Demon Internet Services UK
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Notes on porting stardust.c to GCC on Linux 1.2 and optimizing the inner filter loops.

Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients.
The original stardust.c v1.0 dropped sync whenever there was a scratch or surface pop on the record.

Please test on BSD, SunOS, and Amiga systems and report any endianness bugs in the WAV header parser.

-- 
Lucia Hernández
Opinions expressed are solely my own and not those of Demon Internet Services UK.
------------------------------------------------------------

From nrobertson@netcom.com Fri Jul 07 08:04:51 1995
Path: ashpoly!cascade!brgate!saturno!netcom!nrobertson
From: nrobertson@netcom.com (Nadia Robertson)
Newsgroups: comp.dsp
Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jul07.080451.3219@netcom.com>
Date: Fri, 07 Jul 1995 08:04:51 GMT
References: <1995Jul06.133351.3597@demon.co.uk>
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In article <1995Jul06.133351.3597@demon.co.uk>, lhernandez@demon.co.uk (Lucia Hernández) writes:
> Notes on porting stardust.c to GCC on Linux 1.2 and optimizing the inner filter loops.

Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro.

-- 
Nadia Robertson
Tape trading list upon request. SASE required for international mail.

From njohansson@clari.net Sat Jul 08 10:40:51 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!clari!njohansson
From: njohansson@clari.net (Nadine Johansson)
Newsgroups: comp.dsp
Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jul08.104051.6837@clari.net>
Date: Sat, 08 Jul 1995 10:40:51 GMT
References: <1995Jul06.133351.3597@demon.co.uk> <1995Jul07.080451.3219@netcom.com>
Organization: ClariNet Communications Corp
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In article <1995Jul07.080451.3219@netcom.com>, nrobertson@netcom.com (Nadia Robertson) 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.

-- 
=== Nadine Johansson ===
Dept of Electrical Engineering, ClariNet Communications Corp
"In theory there is no difference between theory and practice."