From kchoi@inria.fr Mon Feb 14 21:40:03 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!inria!kchoi From: kchoi@inria.fr (Katrin Choi) Newsgroups: comp.dsp Subject: Observation: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Feb14.214003.8810@inria.fr> Date: Mon, 14 Feb 1994 21:40:03 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. 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. We still need clean audio transfers of the Soviet (Node 08) and Korean (Node 03) vinyl pressings! -- Katrin Choi | kchoi@inria.fr PGP Key fingerprint: FE52 9D99 81B5 DD85 "Keep the channels open." From ktakahashi@rwth-aachen.de Tue Feb 15 04:06:03 1994 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!ktakahashi From: ktakahashi@rwth-aachen.de (Karen Takahashi) Newsgroups: comp.dsp Subject: Re: Observation: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Feb15.040603.8755@rwth-aachen.de> Date: Tue, 15 Feb 1994 04:06:03 GMT References: <1994Feb14.214003.8810@inria.fr> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1994Feb14.214003.8810@inria.fr>, kchoi@inria.fr (Katrin Choi) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. > Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Karen Takahashi Hayes Optima 288 @ 33,600 bps "The carrier frequency does not drift by accident." From cdubois@delphi.com Wed Feb 16 08:41:03 1994 Path: ashpoly!cascade!bigsur!delphi!cdubois From: cdubois@delphi.com (Callum Dubois) Newsgroups: comp.dsp Subject: Re: Observation: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Feb16.084103.5232@delphi.com> Date: Wed, 16 Feb 1994 08:41:03 GMT References: <1994Feb14.214003.8810@inria.fr> <1994Feb15.040603.8755@rwth-aachen.de> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Feb15.040603.8755@rwth-aachen.de>, ktakahashi@rwth-aachen.de (Karen Takahashi) writes: > Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! -- Callum Dubois | cdubois@delphi.com PGP Key fingerprint: 9C64 5439 9AA3 1EAA "Keep the channels open."