Date: 20 Sep 2005 13:51:33 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: hartzell@alerce.com Cc: freebsd-questions@freebsd.org Subject: Re: hints for troubleshooting poor sound quality. Message-ID: <44d5n3tyoq.fsf@be-well.ilk.org> In-Reply-To: <17199.7192.169898.491491@satchel.alerce.com> References: <17196.47787.731732.312437@satchel.alerce.com> <44zmq9i1bo.fsf@be-well.ilk.org> <17199.7192.169898.491491@satchel.alerce.com>
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George Hartzell <hartzell@kestrel.alerce.com> writes: > Lowell Gilbert writes: > > George Hartzell <hartzell@kestrel.alerce.com> writes: > > > I've set up an ASUS small form factor machine based around an P4S8L > > > motherboard. It's running 6.0BETA4 and Gnome2.12 from the tinderbox > > > packages. > > > > > > I'm kldload'ing snd_ich and (after getting a helpful pointer to the > > > gnome FAQ) all of the sounds stuff is working. > > > > > > Here's my problem: > > > > > > The machine has two mini-jacks, one in the front and one in the > > > back. If I plug a set of headphones into the front jack I hear all > > > kinds of clicks and whirs and buzzing. They seem to correlate with > > > drive activity, cd activity, and maybe even the cpu fan. The > > > connector on the back seems quieter, but I still hear a bit of > > > noise. > > > > > > I hear less noise on a set of sony powerer-subwoofer-and-tweeter > > > speakers, but it's still noticable. > > > > > > I haven't been able to try another sound device, the only spare card > > > that I have doesn't fit into the space provided (riser card). > > > > > > I'd appreciate anythoughts about dealing with the noise. Is this > > > something electrical w/ the motherboard? Something about my Freebsd > > > setup? > > > > Well, yes, it *is* electrical interference on the motherboard. You > > may be able to reduce its impact, though. Reducing the amplifier gain > > (ogain in the mixer(8) output) may help, for example. Also, does > > playing digital audio see this effect, or only playing CDs? If the > > latter, you can switch to digital extraction for playing CDs (most > > software doesn't support it, but some does) and avoid the > > interference. > > Thanks for the feedback. The noise seems to be there when nothing's > happening, when I'm playing an mp3 from disk (that's what digital > audio, right?), and when I'm directly playing a CD. There may not be anything software can do, then. Although you still might want to try the earlier suggestion about reducing the amplifier gain. > Would a pci based sound card be immune from this? One would hope. But not necessarily. > Any recommendations > for one that's not as tall as a sound-blaster LIVE card (space > constraints in the case...). I have no idea; I haven't bought any for years...
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