Date: Fri, 14 Feb 2003 13:41:08 +0100 (MET) From: Peter B <pb@ludd.luth.se> To: freebsd-multimedia@freebsd.org Subject: Bt878 & whitenoise (some observations..) Message-ID: <200302141241.h1ECf8X04143@brother.ludd.luth.se>
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I use FreeBSD-4.7 on a motherboard Asus A7V333 with cpu AMD XP1800, Brooktree 878 card. The lineout of the Bt878 is connected to CD input of the motherboard (aux not supported in freebsd4.7?). Programs used is fxtv + ffmpeg. I'm experiencing heavy white noise added to recordings done with the builtin CMedia CMI8738 soundchip. However it only occours on certain TV channels and won't affect the lineout of the Bt878 (no noise on the stereo). And can sometimes come and go by restarting fxtv.. :) The fenomen is present even if I freeze the picture in fxtv, and use an audio only record program. Anyway I did a table with the fxtv channel number + noise presence. And used fxtv to tune channel, exit. Start ffmpeg to record. As can be seen channels with a low frequency is more likely to be affected. 5 Noise 6 Noise 7 ? (will know in aprox 3 hours, no transmission) 8 Ok 9 Ok 10 Noise 11 Ok 12 Ok 90 Ok 91 Ok 92 Ok 93 Ok Anyone know about any interference issues regarding this? Or maybe there is a bug in the CMI8738 hw/sw ..? /P To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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