Date: Fri, 07 Oct 2005 09:42:28 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: Ariff Abdullah <skywizard@MyBSD.org.my> Cc: freebsd-multimedia@freebsd.org, David Xu <davidxu@freebsd.org>, noackjr@alumni.rice.edu Subject: Re: DAC1 / DAC2 for ex137x - ES1370/1/2/3 , CT5880/CT4730(EV1938) Message-ID: <20051007094228.6dp859nhcg8gsow0@netchild.homeip.net> In-Reply-To: <20051007104020.54184b39.skywizard@MyBSD.org.my> References: <20051006141525.4171b911.skywizard@MyBSD.org.my> <4345C235.8060205@freebsd.org> <20051007090957.28da4c9e.skywizard@MyBSD.org.my> <4345D8E0.2020101@freebsd.org> <20051007104020.54184b39.skywizard@MyBSD.org.my>
next in thread | previous in thread | raw e-mail | index | archive | help
Ariff Abdullah <skywizard@MyBSD.org.my> wrote: > 'Buzz'ing or continuous stuttering/crackling is another issue, mostly > related to non-PREEMPTION kernel or PCI latency timing issue (which is > why you get hw.snd.pcm0.latency_timer on es137x). A thought comes into my mind... Stupid as I am sometimes, I thought so far the bad sound quality of my SoundBlaster PCI (128 or 512 ... damn, I have to look it up at home) is some kind of hardware problem in my PC... I thought this, because in Windows it sounds as bad as with FreeBSD. Ok, Windows is bad, but regarding the multimedia topic I've never seen such bad behavior from Windows XP. That's the reason for thinking it's a hardware problem. But now I'm not sure anymore. I have PREEMPTION in my kernel. And it doesn't sound like stuttering. It sounds like distortion. I don't know how to describe this further. It seems it is related to activity on the PCI bus. Does this sound like a problem which can be solved with latency_timer/slave channels? I think I have to get some time at Sunday to give it a try... Bye, Alexander. -- http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137 When smashing monuments, save the pedestals -- they always come in handy. -- Stanislaw J. Lem, "Unkempt Thoughts"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20051007094228.6dp859nhcg8gsow0>