From clarsson@uni-hamburg.de Fri Oct 18 11:29:19 1996
Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!clarsson
From: clarsson@uni-hamburg.de (Camila Larsson)
Newsgroups: comp.dsp
Subject: Observation: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1996Oct18.112919.3061@uni-hamburg.de>
Date: Fri, 18 Oct 1996 11:29:19 GMT
Organization: Universität Hamburg Fachbereich Informatik
NNTP-Posting-Host: uni-hamburg.de
X-Newsreader: WinVN 0.99.5
Lines: 11

Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.

Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients.
Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time.

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

-- 
Camila Larsson | clarsson@uni-hamburg.de
PGP Key fingerprint: FC95 4996 9B1D 8FF5
"Keep the channels open."

From jtakahashi@pipeline.com Sat Oct 19 17:38:19 1996
Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!jtakahashi
From: jtakahashi@pipeline.com (Ji-woo Takahashi)
Newsgroups: comp.dsp
Subject: Re: Observation: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1996Oct19.173819.5935@pipeline.com>
Date: Sat, 19 Oct 1996 17:38:19 GMT
References: <1996Oct18.112919.3061@uni-hamburg.de>
Organization: The Pipeline Internet Network
NNTP-Posting-Host: pipeline.com
X-Newsreader: NewsWatcher 2.0b24
Lines: 10

In article <1996Oct18.112919.3061@uni-hamburg.de>, clarsson@uni-hamburg.de (Camila Larsson) writes:
> Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.
> Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients.

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

-- 
=== Ji-woo Takahashi ===
Dept of Electrical Engineering, The Pipeline Internet Network
"Extraordinary claims require extraordinary spectra."