Date: Tue, 21 Mar 2006 16:55:48 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-multimedia@FreeBSD.ORG Subject: Re: Poor sound quality with snd_via8233 Message-ID: <200603211555.k2LFtmQs010805@lurza.secnetix.de> In-Reply-To: <20060321205951.423a92c2.ariff@FreeBSD.org>
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Ariff Abdullah <ariff@freebsd.org> wrote: > Niklas Sorensson <nik@cs.chalmers.se> wrote: > > apa# /usr/sbin/mixer > > Mixer vol is currently set to 100:100 > > Mixer pcm is currently set to 100:100 > > Mixer line is currently set to 100:100 > > Mixer mic is currently set to 100:100 > > Mixer cd is currently set to 100:100 > > Mixer rec is currently set to 100:100 > > Mixer igain is currently set to 100:100 > > Mixer ogain is currently set to 10:10 > > Mixer line1 is currently set to 75:75 > > Mixer phin is currently set to 0:0 > > Mixer phout is currently set to 0:0 > > Recording source: mic > > > Reduce those "100" to "85", or less. You're overdriving it too much, > hence, the constant distortion. If you have amplified speaker, use the > volume knob there. In fact, I would recommend to set _all_ of them to zero, except for those that you really need (probably just "vol" and "pcm"). Otherwise your soundcard might pick up some noise from non-connected analog ports (e.g. line or mic), amplify it in the mixer and reduce the overall signal-to- noise ratio. > Report (and partially from my experiences) indicate that using > SCHED_ULE can give better audio/multimedia performance. Perhaps you > want to give it a try. While we're on the topic ... I'd like to say a BIG THANKS to all people working on FreeBSD, particularly the multi- media stuff (sound drivers, AGP, DRI/DRM), the scheduler, VM system and what-not ... Yesterday I burned a CD-R while a lengthy port was compiling in the background, _and_ I watched a video fullscreen at the same time. No sound skipping or any problems. The CD image, the port and the video were all stored on the same HD. That was on a Centrino 1.6 GHz notebook (ICH6 sound hardware, i915 graphics), running RELENG_6, with the standard BSD scheduler. And yes, the CD-R that I've burnt has no errors. :-) Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd Any opinions expressed in this message may be personal to the author and may not necessarily reflect the opinions of secnetix in any way. "IRIX is about as stable as a one-legged drunk with hypothermia in a four-hundred mile per hour wind, balancing on a banana peel on a greased cookie sheet -- when someone throws him an elephant with bad breath and a worse temper." -- Ralf Hildebrandt
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