Date: Tue, 30 May 2006 19:48:03 -0400 (EDT) From: Andy Reitz <reitz@eecs.cwru.edu> To: Mac Newbold <mac@macnewbold.com> Cc: questions@freebsd.org Subject: Re: audio playback glitches while using CD drive Message-ID: <Pine.SOL.4.53.0605301946060.29427@brak> In-Reply-To: <20060530171512.O26913@bas.flux.utah.edu> References: <20060530171512.O26913@bas.flux.utah.edu>
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On Tue, 30 May 2006, Mac Newbold wrote: > > For quite a while now I've put up with this annoyance, and finally decided > to see if I can find anything about it or how to fix it. Google didn't > turn up anything that I could find, so hopefully someone here might be > able to help or point me in the right direction. > > My FreeBSD workstation, currently running 5.5-PRERELEASE though this > happend with various 5.x versions, can't seem to use the > CD-ROM/CD-RW/DVD-RW drive at the same time that it is trying to play an > audio file, like an mp3. I'm set up using the esound daemon, esd, and play > mp3s using mpg123 usually, though other sounds (from gaim, xmms, etc.) are > affected too. Whenever I use the drive, whether using abcde/cdparanoia to > rip or using cdrecord or growisofs to record, I get lots of glitches in my > audio. The glitches come in the form of cracking, crackling, popping, and > other distortion, in addition to slowing down the playback due to the > breaks in it. I get similar crackling and popping while the hard disk > drives are under heavy use, like when rsnapshot/rsync are running backups. > I've confirmed that high CPU usage isn't the cause, because when I don't > use the drives heavily, but am using the CPU a lot, it doesn't occur, like > when lame is encoding an mp3. > > Most of the times my CD/DVD drive is in heavy use, my hard disk is also > being heavily used, so maybe that has something to do with it. > > I've tried turning up the buffering of the audio in the mp3 player to > extreme levels, such that it probably has buffered the entire song, but it > still doesn't help the problem, not even before the buffer is used up. > > Any suggestions or ideas of what might be causing this or what might help > fix it are welcome. Has anyone seen or heard anything like this before? Hi Mac, This doesn't sound like a FreeBSD problem to me, but rather a problem with your sound card being starved for PCI resources when your IDE controller is being exercised. To remedy this, you may need to play around a bit. I found a KB article at creative that seems to cover this topic in a general fashion: http://dmzweb4.europe.creative.com/SRVS/CGI-BIN/WEBCGI.EXE/,/?St=173,E=0000000000127129525,K=5503,Sxi=1,Kb=ww_english_add,VARSET=ws:http://us.creative.com/,Case=obj(6516) Good luck, -Andy Reitz
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