From owner-freebsd-questions@FreeBSD.ORG Mon Sep 19 14:23:10 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7A85E16A420 for ; Mon, 19 Sep 2005 14:23:10 +0000 (GMT) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: from mail26.sea5.speakeasy.net (mail26.sea5.speakeasy.net [69.17.117.28]) by mx1.FreeBSD.org (Postfix) with ESMTP id D84D043D48 for ; Mon, 19 Sep 2005 14:23:09 +0000 (GMT) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: (qmail 29252 invoked from network); 19 Sep 2005 14:23:09 -0000 Received: from dsl092-078-145.bos1.dsl.speakeasy.net (HELO be-well.ilk.org) ([66.92.78.145]) (envelope-sender ) by mail26.sea5.speakeasy.net (qmail-ldap-1.03) with SMTP for ; 19 Sep 2005 14:23:09 -0000 Received: by be-well.ilk.org (Postfix, from userid 1147) id 57D3C3F; Mon, 19 Sep 2005 10:23:08 -0400 (EDT) Sender: lowell@be-well.ilk.org To: hartzell@alerce.com References: <17196.47787.731732.312437@satchel.alerce.com> From: Lowell Gilbert Date: 19 Sep 2005 10:23:07 -0400 In-Reply-To: <17196.47787.731732.312437@satchel.alerce.com> Message-ID: <44zmq9i1bo.fsf@be-well.ilk.org> Lines: 36 User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: freebsd-questions@freebsd.org Subject: Re: hints for troubleshooting poor sound quality. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: freebsd-questions@freebsd.org List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Sep 2005 14:23:10 -0000 George Hartzell 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.